1056609855 has 96 divisors (see below), whose sum is σ = 2245501440. Its totient is φ = 448830720.

The previous prime is 1056609839. The next prime is 1056609907. The reversal of 1056609855 is 5589066501.

It is a happy number.

1056609855 is a `hidden beast` number, since 1 + 0 + 566 + 0 + 9 + 85 + 5 = 666.

It is not a de Polignac number, because 1056609855 - 2⁴ = 1056609839 is a prime.

It is a super-2 number, since 2×1056609855² = 2232848771366242050, which contains 22 as substring.

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 1056609855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 315540 + ... + 318870.

It is an arithmetic number, because the mean of its divisors is an integer number (23390640).

Almost surely, 2^1056609855 is an apocalyptic number.

1056609855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1056609855 is an abundant number, since it is smaller than the sum of its proper divisors (1188891585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1056609855 is a wasteful number, since it uses less digits than its factorization.

1056609855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421 (or 3418 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 1056609855 is about 32505.5357593134. The cubic root of 1056609855 is about 1018.5246692981.

The spelling of 1056609855 in words is "one billion, fifty-six million, six hundred nine thousand, eight hundred fifty-five".