64000639700 has 36 divisors (see below), whose sum is σ = 140256473532. Its totient is φ = 25346784000.

The previous prime is 64000639693. The next prime is 64000639741. The reversal of 64000639700 is 793600046.

It can be written as a sum of positive squares in 6 ways, for example, as 12751829776 + 51248809924 = 112924^2 + 226382^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3158249 + ... + 3178448.

Almost surely, 2^64000639700 is an apocalyptic number.

It is an amenable number.

64000639700 is an abundant number, since it is smaller than the sum of its proper divisors (76255833832).

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

64000639700 is a wasteful number, since it uses less digits than its factorization.

64000639700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336812 (or 6336805 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The spelling of 64000639700 in words is "sixty-four billion, six hundred thirty-nine thousand, seven hundred".