138761512 has 16 divisors (see below), whose sum is σ = 260379360. Its totient is φ = 69327024.

The previous prime is 138761471. The next prime is 138761521. The reversal of 138761512 is 215167831.

It is a happy number.

It is a super-2 number, since 2×138761512² = 38509514425052288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5583 + ... + 17569.

It is an arithmetic number, because the mean of its divisors is an integer number (16273710).

Almost surely, 2^138761512 is an apocalyptic number.

It is an amenable number.

138761512 is a deficient number, since it is larger than the sum of its proper divisors (121617848).

138761512 is a wasteful number, since it uses less digits than its factorization.

138761512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440 (or 13436 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 138761512 is about 11779.7076364399. The cubic root of 138761512 is about 517.7137200592.

The spelling of 138761512 in words is "one hundred thirty-eight million, seven hundred sixty-one thousand, five hundred twelve".