64757115648 has 216 divisors, whose sum is σ = 189888294960. Its totient is φ = 21220392960.

The previous prime is 64757115611. The next prime is 64757115653. The reversal of 64757115648 is 84651175746.

64757115648 is a `hidden beast` number, since 6 + 4 + 7 + 5 + 71 + 1 + 564 + 8 = 666.

It is a super-3 number, since 3×64757115648³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64757115594 and 64757115603.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87627663 + ... + 87628401.

Almost surely, 2^64757115648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64757115648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94944147480).

64757115648 is an abundant number, since it is smaller than the sum of its proper divisors (125131179312).

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

64757115648 is a wasteful number, since it uses less digits than its factorization.

64757115648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1338 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 64757115648 in words is "sixty-four billion, seven hundred fifty-seven million, one hundred fifteen thousand, six hundred forty-eight".