2156134656 has 72 divisors (see below), whose sum is σ = 6179911360. Its totient is φ = 663422976.

The previous prime is 2156134627. The next prime is 2156134657. The reversal of 2156134656 is 6564316512.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2156134657) 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, 97996 + ... + 117963.

Almost surely, 2^2156134656 is an apocalyptic number.

2156134656 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2156134656 is an abundant number, since it is smaller than the sum of its proper divisors (4023776704).

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

2156134656 is a wasteful number, since it uses less digits than its factorization.

2156134656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215991 (or 215977 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 2156134656 is about 46434.1970534648. The cubic root of 2156134656 is about 1291.8892766479.

The spelling of 2156134656 in words is "two billion, one hundred fifty-six million, one hundred thirty-four thousand, six hundred fifty-six".