138006968864 has 24 divisors (see below), whose sum is σ = 287683645788. Its totient is φ = 64944455680.

The previous prime is 138006968861. The next prime is 138006968941. The reversal of 138006968864 is 468869600831.

It can be written as a sum of positive squares in 2 ways, for example, as 132277690000 + 5729278864 = 363700^2 + 75692^2 .

It is not an unprimeable number, because it can be changed into a prime (138006968861) 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, 126844097 + ... + 126845184.

Almost surely, 2^138006968864 is an apocalyptic number.

It is an amenable number.

138006968864 is an abundant number, since it is smaller than the sum of its proper divisors (149676676924).

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

138006968864 is a wasteful number, since it uses less digits than its factorization.

138006968864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253689308 (or 253689300 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 138006968864 in words is "one hundred thirty-eight billion, six million, nine hundred sixty-eight thousand, eight hundred sixty-four".