2656156240 has 20 divisors (see below), whose sum is σ = 6175563444. Its totient is φ = 1062462464.

The previous prime is 2656156201. The next prime is 2656156247. The reversal of 2656156240 is 426516562.

It can be written as a sum of positive squares in 2 ways, for example, as 443018304 + 2213137936 = 21048^2 + 47044^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2656156240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656156247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16600897 + ... + 16601056.

Almost surely, 2^2656156240 is an apocalyptic number.

2656156240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656156240 is an abundant number, since it is smaller than the sum of its proper divisors (3519407204).

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

2656156240 is a wasteful number, since it uses less digits than its factorization.

2656156240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201966 (or 33201960 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2656156240 is about 51537.9107065857. The cubic root of 2656156240 is about 1384.8982691464.

The spelling of 2656156240 in words is "two billion, six hundred fifty-six million, one hundred fifty-six thousand, two hundred forty".