648657801580 has 12 divisors (see below), whose sum is σ = 1362181383360. Its totient is φ = 259463120624.

The previous prime is 648657801563. The next prime is 648657801611. The reversal of 648657801580 is 85108756846.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16216445020 + ... + 16216445059.

It is an arithmetic number, because the mean of its divisors is an integer number (113515115280).

Almost surely, 2^648657801580 is an apocalyptic number.

It is an amenable number.

648657801580 is an abundant number, since it is smaller than the sum of its proper divisors (713523581780).

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

648657801580 is a wasteful number, since it uses less digits than its factorization.

648657801580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32432890088 (or 32432890086 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 648657801580 in words is "six hundred forty-eight billion, six hundred fifty-seven million, eight hundred one thousand, five hundred eighty".