64745557658 has 16 divisors (see below), whose sum is σ = 101505165120. Its totient is φ = 30915066336.

The previous prime is 64745557633. The next prime is 64745557693. The reversal of 64745557658 is 85675554746.

64745557658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 64745557658.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1112228 + ... + 1168991.

It is an arithmetic number, because the mean of its divisors is an integer number (6344072820).

Almost surely, 2^64745557658 is an apocalyptic number.

64745557658 is a deficient number, since it is larger than the sum of its proper divisors (36759607462).

64745557658 is a wasteful number, since it uses less digits than its factorization.

64745557658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281861.

The product of its digits is 141120000, while the sum is 62.

The spelling of 64745557658 in words is "sixty-four billion, seven hundred forty-five million, five hundred fifty-seven thousand, six hundred fifty-eight".