64762566976 has 28 divisors (see below), whose sum is σ = 131986553908. Its totient is φ = 31506112512.

The previous prime is 64762566949. The next prime is 64762566977. The reversal of 64762566976 is 67966526746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32391360576 + 32371206400 = 179976^2 + 179920^2 .

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64762566977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13672161 + ... + 13676896.

Almost surely, 2^64762566976 is an apocalyptic number.

It is an amenable number.

64762566976 is an abundant number, since it is smaller than the sum of its proper divisors (67223986932).

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

64762566976 is a wasteful number, since it uses less digits than its factorization.

64762566976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27349106 (or 27349096 counting only the distinct ones).

The product of its digits is 137168640, while the sum is 64.

The spelling of 64762566976 in words is "sixty-four billion, seven hundred sixty-two million, five hundred sixty-six thousand, nine hundred seventy-six".