944574649921 has 16 divisors (see below), whose sum is σ = 1136359296000. Its totient is φ = 767003523408.

The previous prime is 944574649877. The next prime is 944574649961. The reversal of 944574649921 is 129946475449.

944574649921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 944574649921 - 2²⁵ = 944541095489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (944574649961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7639236 + ... + 7761898.

It is an arithmetic number, because the mean of its divisors is an integer number (71022456000).

Almost surely, 2^944574649921 is an apocalyptic number.

It is an amenable number.

944574649921 is a deficient number, since it is larger than the sum of its proper divisors (191784646079).

944574649921 is a wasteful number, since it uses less digits than its factorization.

944574649921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180588.

The product of its digits is 78382080, while the sum is 64.

The spelling of 944574649921 in words is "nine hundred forty-four billion, five hundred seventy-four million, six hundred forty-nine thousand, nine hundred twenty-one".