64658630388 has 48 divisors (see below), whose sum is σ = 164621096640. Its totient is φ = 19589299200.

The previous prime is 64658630383. The next prime is 64658630419. The reversal of 64658630388 is 88303685646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64658630381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591268 + ... + 692036.

It is an arithmetic number, because the mean of its divisors is an integer number (3429606180).

Almost surely, 2^64658630388 is an apocalyptic number.

It is an amenable number.

64658630388 is an abundant number, since it is smaller than the sum of its proper divisors (99962466252).

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

64658630388 is a wasteful number, since it uses less digits than its factorization.

64658630388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105648 (or 105646 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 57.

The spelling of 64658630388 in words is "sixty-four billion, six hundred fifty-eight million, six hundred thirty thousand, three hundred eighty-eight".