138939279452 has 6 divisors (see below), whose sum is σ = 243143739048. Its totient is φ = 69469639724.

The previous prime is 138939279443. The next prime is 138939279461. The reversal of 138939279452 is 254972939831.

It is an interprime number because it is at equal distance from previous prime (138939279443) and next prime (138939279461).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17367409928 + ... + 17367409935.

It is an arithmetic number, because the mean of its divisors is an integer number (40523956508).

Almost surely, 2^138939279452 is an apocalyptic number.

It is an amenable number.

138939279452 is a deficient number, since it is larger than the sum of its proper divisors (104204459596).

138939279452 is a wasteful number, since it uses less digits than its factorization.

138939279452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34734819867 (or 34734819865 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 62.

The spelling of 138939279452 in words is "one hundred thirty-eight billion, nine hundred thirty-nine million, two hundred seventy-nine thousand, four hundred fifty-two".