138950422665 has 16 divisors (see below), whose sum is σ = 229986907200. Its totient is φ = 71551481792.

The previous prime is 138950422661. The next prime is 138950422691. The reversal of 138950422665 is 566224059831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138950422665 - 2² = 138950422661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138950422661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159712695 + ... + 159713564.

It is an arithmetic number, because the mean of its divisors is an integer number (14374181700).

Almost surely, 2^138950422665 is an apocalyptic number.

138950422665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138950422665 is a deficient number, since it is larger than the sum of its proper divisors (91036484535).

138950422665 is a wasteful number, since it uses less digits than its factorization.

138950422665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319426296.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 138950422665 in words is "one hundred thirty-eight billion, nine hundred fifty million, four hundred twenty-two thousand, six hundred sixty-five".