138957612477 has 4 divisors (see below), whose sum is σ = 185276816640. Its totient is φ = 92638408316.

The previous prime is 138957612463. The next prime is 138957612481. The reversal of 138957612477 is 774216759831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138957612477 - 2⁶ = 138957612413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138957612477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138957612407) 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, 23159602077 + ... + 23159602082.

It is an arithmetic number, because the mean of its divisors is an integer number (46319204160).

Almost surely, 2^138957612477 is an apocalyptic number.

It is an amenable number.

138957612477 is a deficient number, since it is larger than the sum of its proper divisors (46319204163).

138957612477 is an equidigital number, since it uses as much as digits as its factorization.

138957612477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46319204162.

The product of its digits is 17781120, while the sum is 60.

The spelling of 138957612477 in words is "one hundred thirty-eight billion, nine hundred fifty-seven million, six hundred twelve thousand, four hundred seventy-seven".