2156104772 has 24 divisors (see below), whose sum is σ = 3816092952. Its totient is φ = 1065824000.

The previous prime is 2156104763. The next prime is 2156104807. The reversal of 2156104772 is 2774016512.

It can be written as a sum of positive squares in 4 ways, for example, as 508231936 + 1647872836 = 22544^2 + 40594^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303938 + ... + 310950.

It is an arithmetic number, because the mean of its divisors is an integer number (159003873).

Almost surely, 2^2156104772 is an apocalyptic number.

It is an amenable number.

2156104772 is a deficient number, since it is larger than the sum of its proper divisors (1659988180).

2156104772 is a wasteful number, since it uses less digits than its factorization.

2156104772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7879 (or 7877 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2156104772 is about 46433.8752636478. The cubic root of 2156104772 is about 1291.8833080971.

The spelling of 2156104772 in words is "two billion, one hundred fifty-six million, one hundred four thousand, seven hundred seventy-two".