2972256656 has 20 divisors (see below), whose sum is σ = 5759918172. Its totient is φ = 1485826176.

The previous prime is 2972256653. The next prime is 2972256667. The reversal of 2972256656 is 6566522792.

It can be written as a sum of positive squares in 2 ways, for example, as 2227840000 + 744416656 = 47200^2 + 27284^2 .

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2972256653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77030 + ... + 108986.

Almost surely, 2^2972256656 is an apocalyptic number.

It is an amenable number.

2972256656 is a deficient number, since it is larger than the sum of its proper divisors (2787661516).

2972256656 is a wasteful number, since it uses less digits than its factorization.

2972256656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37778 (or 37772 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 50.

The square root of 2972256656 is about 54518.4065797965. The cubic root of 2972256656 is about 1437.7899250985.

The spelling of 2972256656 in words is "two billion, nine hundred seventy-two million, two hundred fifty-six thousand, six hundred fifty-six".