1557613485 has 24 divisors (see below), whose sum is σ = 2717072280. Its totient is φ = 825432192.

The previous prime is 1557613481. The next prime is 1557613489. The reversal of 1557613485 is 5843167551.

1557613485 is a `hidden beast` number, since 1 + 557 + 6 + 13 + 4 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (1557613481) and next prime (1557613489).

It can be written as a sum of positive squares in 4 ways, for example, as 23011209 + 1534602276 = 4797^2 + 39174^2 .

It is not a de Polignac number, because 1557613485 - 2² = 1557613481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1557613485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557613481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103170 + ... + 117299.

It is an arithmetic number, because the mean of its divisors is an integer number (113211345).

Almost surely, 2^1557613485 is an apocalyptic number.

1557613485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1557613485 is a deficient number, since it is larger than the sum of its proper divisors (1159458795).

1557613485 is a wasteful number, since it uses less digits than its factorization.

1557613485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220637 (or 220634 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 1557613485 is about 39466.6122817756. The cubic root of 1557613485 is about 1159.1862815347.

The spelling of 1557613485 in words is "one billion, five hundred fifty-seven million, six hundred thirteen thousand, four hundred eighty-five".