644366130924 has 24 divisors (see below), whose sum is σ = 1555366523760. Its totient is φ = 207382202944.

The previous prime is 644366130899. The next prime is 644366131009. The reversal of 644366130924 is 429031663446.

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, 925813059 + ... + 925813754.

It is an arithmetic number, because the mean of its divisors is an integer number (64806938490).

Almost surely, 2^644366130924 is an apocalyptic number.

It is an amenable number.

644366130924 is an abundant number, since it is smaller than the sum of its proper divisors (911000392836).

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

644366130924 is a wasteful number, since it uses less digits than its factorization.

644366130924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851626849 (or 1851626847 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 644366130924 in words is "six hundred forty-four billion, three hundred sixty-six million, one hundred thirty thousand, nine hundred twenty-four".