138977941440 has 112 divisors (see below), whose sum is σ = 475197696288. Its totient is φ = 34209951744.

The previous prime is 138977941409. The next prime is 138977941489. The reversal of 138977941440 is 44149779831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5555547 + ... + 5580506.

It is an arithmetic number, because the mean of its divisors is an integer number (4242836574).

Almost surely, 2^138977941440 is an apocalyptic number.

138977941440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138977941440 is an abundant number, since it is smaller than the sum of its proper divisors (336219754848).

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

138977941440 is a wasteful number, since it uses less digits than its factorization.

138977941440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11136086 (or 11136076 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 138977941440 in words is "one hundred thirty-eight billion, nine hundred seventy-seven million, nine hundred forty-one thousand, four hundred forty".