64642613202 has 12 divisors (see below), whose sum is σ = 140058995310. Its totient is φ = 21547537728.

The previous prime is 64642613179. The next prime is 64642613209. The reversal of 64642613202 is 20231624646.

64642613202 is a `hidden beast` number, since 6 + 4 + 642 + 6 + 1 + 3 + 2 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 61921843281 + 2720769921 = 248841^2 + 52161^2 .

It is not an unprimeable number, because it can be changed into a prime (64642613209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1795628127 + ... + 1795628162.

Almost surely, 2^64642613202 is an apocalyptic number.

64642613202 is an abundant number, since it is smaller than the sum of its proper divisors (75416382108).

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

64642613202 is a wasteful number, since it uses less digits than its factorization.

64642613202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591256297 (or 3591256294 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 64642613202 in words is "sixty-four billion, six hundred forty-two million, six hundred thirteen thousand, two hundred two".