64712811380 has 36 divisors (see below), whose sum is σ = 158084155908. Its totient is φ = 22187249280.

The previous prime is 64712811377. The next prime is 64712811389. The reversal of 64712811380 is 8311821746.

64712811380 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 2 ways, for example, as 49096810084 + 15616001296 = 221578^2 + 124964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64712811389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33015761 + ... + 33017720.

It is an arithmetic number, because the mean of its divisors is an integer number (4391226553).

Almost surely, 2^64712811380 is an apocalyptic number.

It is an amenable number.

64712811380 is an abundant number, since it is smaller than the sum of its proper divisors (93371344528).

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

64712811380 is a wasteful number, since it uses less digits than its factorization.

64712811380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66033504 (or 66033495 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 64712811380 in words is "sixty-four billion, seven hundred twelve million, eight hundred eleven thousand, three hundred eighty".