1556853479 has 4 divisors (see below), whose sum is σ = 1556952600. Its totient is φ = 1556754360.

The previous prime is 1556853461. The next prime is 1556853481. The reversal of 1556853479 is 9743586551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1556853479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556853479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556853679) 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 3 ways as a sum of consecutive naturals, for example, 20204 + ... + 59345.

It is an arithmetic number, because the mean of its divisors is an integer number (389238150).

Almost surely, 2^1556853479 is an apocalyptic number.

1556853479 is a deficient number, since it is larger than the sum of its proper divisors (99121).

1556853479 is an equidigital number, since it uses as much as digits as its factorization.

1556853479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99120.

The product of its digits is 4536000, while the sum is 53.

The square root of 1556853479 is about 39456.9826393251. The cubic root of 1556853479 is about 1158.9977170282.

The spelling of 1556853479 in words is "one billion, five hundred fifty-six million, eight hundred fifty-three thousand, four hundred seventy-nine".