1056615665 has 48 divisors (see below), whose sum is σ = 1504600272. Its totient is φ = 710148096.

The previous prime is 1056615649. The next prime is 1056615673. The reversal of 1056615665 is 5665166501.

It can be written as a sum of positive squares in 8 ways, for example, as 220017889 + 836597776 = 14833^2 + 28924^2 .

It is not a de Polignac number, because 1056615665 - 2⁴ = 1056615649 is a prime.

It is a super-2 number, since 2×1056615665² = 2232873327046784450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4111217 + ... + 4111473.

It is an arithmetic number, because the mean of its divisors is an integer number (31345839).

Almost surely, 2^1056615665 is an apocalyptic number.

It is an amenable number.

1056615665 is a deficient number, since it is larger than the sum of its proper divisors (447984607).

1056615665 is a wasteful number, since it uses less digits than its factorization.

1056615665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546 (or 539 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 1056615665 is about 32505.6251285835. The cubic root of 1056615665 is about 1018.5265361547.

The spelling of 1056615665 in words is "one billion, fifty-six million, six hundred fifteen thousand, six hundred sixty-five".