2647040656 has 40 divisors (see below), whose sum is σ = 5713618680. Its totient is φ = 1179580416.

The previous prime is 2647040653. The next prime is 2647040657. The reversal of 2647040656 is 6560407462.

It can be written as a sum of positive squares in 4 ways, for example, as 98406400 + 2548634256 = 9920^2 + 50484^2 .

It is not an unprimeable number, because it can be changed into a prime (2647040653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213385 + ... + 225448.

It is an arithmetic number, because the mean of its divisors is an integer number (142840467).

Almost surely, 2^2647040656 is an apocalyptic number.

2647040656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2647040656 is an abundant number, since it is smaller than the sum of its proper divisors (3066578024).

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

2647040656 is a wasteful number, since it uses less digits than its factorization.

2647040656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438883 (or 438877 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 2647040656 is about 51449.3989857996. The cubic root of 2647040656 is about 1383.3121895576.

The spelling of 2647040656 in words is "two billion, six hundred forty-seven million, forty thousand, six hundred fifty-six".