2155446972 has 36 divisors (see below), whose sum is σ = 6226847536. Its totient is φ = 615841920.

The previous prime is 2155446929. The next prime is 2155447013. The reversal of 2155446972 is 2796445512.

2155446972 is a `hidden beast` number, since 2 + 1 + 554 + 4 + 6 + 97 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4276429 + ... + 4276932.

Almost surely, 2^2155446972 is an apocalyptic number.

It is an amenable number.

2155446972 is an abundant number, since it is smaller than the sum of its proper divisors (4071400564).

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

2155446972 is a wasteful number, since it uses less digits than its factorization.

2155446972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8553378 (or 8553373 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 2155446972 is about 46426.7915324762. The cubic root of 2155446972 is about 1291.7519157073.

The spelling of 2155446972 in words is "two billion, one hundred fifty-five million, four hundred forty-six thousand, nine hundred seventy-two".