2921156656 has 20 divisors (see below), whose sum is σ = 6174263304. Its totient is φ = 1327798400.

The previous prime is 2921156633. The next prime is 2921156657. The reversal of 2921156656 is 6566511292.

It is not an unprimeable number, because it can be changed into a prime (2921156657) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8298565 + ... + 8298916.

Almost surely, 2^2921156656 is an apocalyptic number.

It is an amenable number.

2921156656 is an abundant number, since it is smaller than the sum of its proper divisors (3253106648).

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

2921156656 is a wasteful number, since it uses less digits than its factorization.

2921156656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16597500 (or 16597494 counting only the distinct ones).

The product of its digits is 194400, while the sum is 43.

The square root of 2921156656 is about 54047.7257245853. The cubic root of 2921156656 is about 1429.5025991074.

The spelling of 2921156656 in words is "two billion, nine hundred twenty-one million, one hundred fifty-six thousand, six hundred fifty-six".