2157984960944 has 10 divisors (see below), whose sum is σ = 4181095861860. Its totient is φ = 1078992480464.

The previous prime is 2157984960917. The next prime is 2157984960947. The reversal of 2157984960944 is 4490694897512.

It is a super-2 number, since 2×2157984960944² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2157984960947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67437030014 + ... + 67437030045.

It is an arithmetic number, because the mean of its divisors is an integer number (418109586186).

Almost surely, 2^{2157984960944} is an apocalyptic number.

It is an amenable number.

2157984960944 is a deficient number, since it is larger than the sum of its proper divisors (2023110900916).

2157984960944 is a wasteful number, since it uses less digits than its factorization.

2157984960944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134874060067 (or 134874060061 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 2157984960944 in words is "two trillion, one hundred fifty-seven billion, nine hundred eighty-four million, nine hundred sixty thousand, nine hundred forty-four".