64618791948 has 36 divisors (see below), whose sum is σ = 163389375240. Its totient is φ = 21533342976.

The previous prime is 64618791857. The next prime is 64618791959. The reversal of 64618791948 is 84919781646.

64618791948 is a `hidden beast` number, since 6 + 4 + 618 + 7 + 9 + 1 + 9 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134053 + ... + 383676.

Almost surely, 2^64618791948 is an apocalyptic number.

It is an amenable number.

64618791948 is an abundant number, since it is smaller than the sum of its proper divisors (98770583292).

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

64618791948 is a wasteful number, since it uses less digits than its factorization.

64618791948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521206 (or 521201 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 64618791948 in words is "sixty-four billion, six hundred eighteen million, seven hundred ninety-one thousand, nine hundred forty-eight".