2645572656 has 40 divisors (see below), whose sum is σ = 6849673200. Its totient is φ = 879886336.

The previous prime is 2645572621. The next prime is 2645572669. The reversal of 2645572656 is 6562755462.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39825 + ... + 82928.

It is an arithmetic number, because the mean of its divisors is an integer number (171241830).

Almost surely, 2^2645572656 is an apocalyptic number.

It is an amenable number.

2645572656 is an abundant number, since it is smaller than the sum of its proper divisors (4204100544).

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

2645572656 is a wasteful number, since it uses less digits than its factorization.

2645572656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123213 (or 123207 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 48.

The square root of 2645572656 is about 51435.1305626806. The cubic root of 2645572656 is about 1383.0564224488.

The spelling of 2645572656 in words is "two billion, six hundred forty-five million, five hundred seventy-two thousand, six hundred fifty-six".