2156770332 has 36 divisors (see below), whose sum is σ = 5738776680. Its totient is φ = 681085152.

The previous prime is 2156770309. The next prime is 2156770333. The reversal of 2156770332 is 2330776512.

2156770332 is a `hidden beast` number, since 21 + 567 + 70 + 3 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156770333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1575903 + ... + 1577270.

Almost surely, 2^2156770332 is an apocalyptic number.

It is an amenable number.

2156770332 is an abundant number, since it is smaller than the sum of its proper divisors (3582006348).

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

2156770332 is a wasteful number, since it uses less digits than its factorization.

2156770332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153202 (or 3153197 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 2156770332 is about 46441.0414611903. The cubic root of 2156770332 is about 1292.0162233136.

The spelling of 2156770332 in words is "two billion, one hundred fifty-six million, seven hundred seventy thousand, three hundred thirty-two".