31368738064 has 10 divisors (see below), whose sum is σ = 60776930030. Its totient is φ = 15684369024.

The previous prime is 31368738061. The next prime is 31368738083. The reversal of 31368738064 is 46083786313.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 25405809664 + 5962928400 = 159392^2 + 77220^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31368737999 and 31368738017.

It is not an unprimeable number, because it can be changed into a prime (31368738061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980273049 + ... + 980273080.

It is an arithmetic number, because the mean of its divisors is an integer number (6077693003).

Almost surely, 2^31368738064 is an apocalyptic number.

It is an amenable number.

31368738064 is a deficient number, since it is larger than the sum of its proper divisors (29408191966).

31368738064 is a wasteful number, since it uses less digits than its factorization.

31368738064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960546137 (or 1960546131 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 31368738064 in words is "thirty-one billion, three hundred sixty-eight million, seven hundred thirty-eight thousand, sixty-four".