64380942756 has 81 divisors (see below), whose sum is σ = 176276384739. Its totient is φ = 19803431232.

The previous prime is 64380942737. The next prime is 64380942763. The reversal of 64380942756 is 65724908346.

The square root of 64380942756 is 253734.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6550312356 + 57830630400 = 80934^2 + 240480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19789626 + ... + 19792878.

Almost surely, 2^64380942756 is an apocalyptic number.

64380942756 is the 253734-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64380942756

64380942756 is an abundant number, since it is smaller than the sum of its proper divisors (111895441983).

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

64380942756 is a wasteful number, since it uses less digits than its factorization.

64380942756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 64380942756 in words is "sixty-four billion, three hundred eighty million, nine hundred forty-two thousand, seven hundred fifty-six".