64507702436 has 24 divisors (see below), whose sum is σ = 116138242584. Its totient is φ = 31332101120.

The previous prime is 64507702421. The next prime is 64507702453. The reversal of 64507702436 is 63420770546.

64507702436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 270799936 + 64236902500 = 16456^2 + 253450^2 .

It is a super-2 number, since 2×64507702436² (a number of 22 digits) contains 22 as substring.

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, 805865 + ... + 882288.

It is an arithmetic number, because the mean of its divisors is an integer number (4839093441).

Almost surely, 2^64507702436 is an apocalyptic number.

It is an amenable number.

64507702436 is a deficient number, since it is larger than the sum of its proper divisors (51630540148).

64507702436 is a wasteful number, since it uses less digits than its factorization.

64507702436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688431 (or 1688429 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 44.

The spelling of 64507702436 in words is "sixty-four billion, five hundred seven million, seven hundred two thousand, four hundred thirty-six".