64724604068 has 6 divisors (see below), whose sum is σ = 113268057126. Its totient is φ = 32362302032.

The previous prime is 64724604047. The next prime is 64724604079. The reversal of 64724604068 is 86040642746.

It can be written as a sum of positive squares in only one way, i.e., 42637294144 + 22087309924 = 206488^2 + 148618^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8090575505 + ... + 8090575512.

It is an arithmetic number, because the mean of its divisors is an integer number (18878009521).

Almost surely, 2^64724604068 is an apocalyptic number.

It is an amenable number.

64724604068 is a deficient number, since it is larger than the sum of its proper divisors (48543453058).

64724604068 is a wasteful number, since it uses less digits than its factorization.

64724604068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16181151021 (or 16181151019 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 47.

The spelling of 64724604068 in words is "sixty-four billion, seven hundred twenty-four million, six hundred four thousand, sixty-eight".