1056711556665 has 48 divisors (see below), whose sum is σ = 1848120962688. Its totient is φ = 558507898368.

The previous prime is 1056711556619. The next prime is 1056711556669. The reversal of 1056711556665 is 5666551176501.

It is not a de Polignac number, because 1056711556665 - 2⁶ = 1056711556601 is a prime.

It is a super-2 number, since 2×1056711556665² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1056711556669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48535612 + ... + 48557378.

It is an arithmetic number, because the mean of its divisors is an integer number (38502520056).

Almost surely, 2^{1056711556665} is an apocalyptic number.

1056711556665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1056711556665 is a deficient number, since it is larger than the sum of its proper divisors (791409406023).

1056711556665 is a wasteful number, since it uses less digits than its factorization.

1056711556665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31438 (or 31435 counting only the distinct ones).

The product of its (nonzero) digits is 5670000, while the sum is 54.

The spelling of 1056711556665 in words is "one trillion, fifty-six billion, seven hundred eleven million, five hundred fifty-six thousand, six hundred sixty-five".