64558335516 has 72 divisors (see below), whose sum is σ = 160219812480. Its totient is φ = 20228091648.

The previous prime is 64558335497. The next prime is 64558335521. The reversal of 64558335516 is 61553385546.

64558335516 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 (51).

It is a congruent number.

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, 2842855 + ... + 2865473.

Almost surely, 2^64558335516 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 64558335516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80109906240).

64558335516 is an abundant number, since it is smaller than the sum of its proper divisors (95661476964).

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

64558335516 is a wasteful number, since it uses less digits than its factorization.

64558335516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23483 (or 23464 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 51.

The spelling of 64558335516 in words is "sixty-four billion, five hundred fifty-eight million, three hundred thirty-five thousand, five hundred sixteen".