1815436485 has 12 divisors (see below), whose sum is σ = 3146756652. Its totient is φ = 968232768.

The previous prime is 1815436471. The next prime is 1815436501. The reversal of 1815436485 is 5846345181.

1815436485 is a `hidden beast` number, since 18 + 154 + 3 + 6 + 485 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1129363236 + 686073249 = 33606^2 + 26193^2 .

It is not a de Polignac number, because 1815436485 - 2⁶ = 1815436421 is a prime.

It is a super-4 number, since 4×1815436485⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 40343033 = 1815436485 / (1 + 8 + 1 + 5 + 4 + 3 + 6 + 4 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1815436485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20171472 + ... + 20171561.

It is an arithmetic number, because the mean of its divisors is an integer number (262229721).

Almost surely, 2^1815436485 is an apocalyptic number.

1815436485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1815436485 is a deficient number, since it is larger than the sum of its proper divisors (1331320167).

1815436485 is a wasteful number, since it uses less digits than its factorization.

1815436485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40343044 (or 40343041 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 1815436485 is about 42607.9392249848. The cubic root of 1815436485 is about 1219.9078325517.

The spelling of 1815436485 in words is "one billion, eight hundred fifteen million, four hundred thirty-six thousand, four hundred eighty-five".