138061865244 has 24 divisors (see below), whose sum is σ = 326557290640. Its totient is φ = 45390201984.

The previous prime is 138061865233. The next prime is 138061865251. The reversal of 138061865244 is 442568160831.

It is a super-2 number, since 2×138061865244² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138061865193 and 138061865202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78801559 + ... + 78803310.

Almost surely, 2^138061865244 is an apocalyptic number.

It is an amenable number.

138061865244 is an abundant number, since it is smaller than the sum of its proper divisors (188495425396).

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

138061865244 is a wasteful number, since it uses less digits than its factorization.

138061865244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157604949 (or 157604947 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 138061865244 in words is "one hundred thirty-eight billion, sixty-one million, eight hundred sixty-five thousand, two hundred forty-four".