648907618920 has 128 divisors (see below), whose sum is σ = 2132813255040. Its totient is φ = 156635709440.

The previous prime is 648907618841. The next prime is 648907618943. The reversal of 648907618920 is 29816709846.

648907618920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747369 + ... + 1362488.

It is an arithmetic number, because the mean of its divisors is an integer number (16662603555).

Almost surely, 2^648907618920 is an apocalyptic number.

648907618920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648907618920 is an abundant number, since it is smaller than the sum of its proper divisors (1483905636120).

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

648907618920 is a wasteful number, since it uses less digits than its factorization.

648907618920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110115 (or 2110111 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 648907618920 in words is "six hundred forty-eight billion, nine hundred seven million, six hundred eighteen thousand, nine hundred twenty".