944574649920 has 672 divisors, whose sum is σ = 3705063358464. Its totient is φ = 218637619200.

The previous prime is 944574649877. The next prime is 944574649961. The reversal of 944574649920 is 29946475449.

944574649920 is a `hidden beast` number, since 94 + 4 + 57 + 4 + 6 + 499 + 2 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 663790329 + ... + 663791751.

Almost surely, 2^944574649920 is an apocalyptic number.

944574649920 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 944574649920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1852531679232).

944574649920 is an abundant number, since it is smaller than the sum of its proper divisors (2760488708544).

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

944574649920 is a wasteful number, since it uses less digits than its factorization.

944574649920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391 (or 2378 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 944574649920 in words is "nine hundred forty-four billion, five hundred seventy-four million, six hundred forty-nine thousand, nine hundred twenty".