2656137870 has 96 divisors (see below), whose sum is σ = 7466078880. Its totient is φ = 652872960.

The previous prime is 2656137859. The next prime is 2656137893. The reversal of 2656137870 is 787316562.

2656137870 is a `hidden beast` number, since 2 + 6 + 561 + 3 + 7 + 87 + 0 = 666.

2656137870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 42280 + ... + 84260.

It is an arithmetic number, because the mean of its divisors is an integer number (77771655).

Almost surely, 2^2656137870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2656137870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3733039440).

2656137870 is an abundant number, since it is smaller than the sum of its proper divisors (4809941010).

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

2656137870 is a wasteful number, since it uses less digits than its factorization.

2656137870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42050 (or 42047 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 2656137870 is about 51537.7324879549. The cubic root of 2656137870 is about 1384.8950764829.

The spelling of 2656137870 in words is "two billion, six hundred fifty-six million, one hundred thirty-seven thousand, eight hundred seventy".