138641512 has 16 divisors (see below), whose sum is σ = 260100000. Its totient is φ = 69281520.

The previous prime is 138641501. The next prime is 138641513. The reversal of 138641512 is 215146831.

It is a super-2 number, since 2×138641512² = 38442937699292288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138641513) 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, 14739 + ... + 22237.

It is an arithmetic number, because the mean of its divisors is an integer number (16256250).

Almost surely, 2^138641512 is an apocalyptic number.

It is an amenable number.

138641512 is a deficient number, since it is larger than the sum of its proper divisors (121458488).

138641512 is a wasteful number, since it uses less digits than its factorization.

138641512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816 (or 9812 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 138641512 is about 11774.6130297348. The cubic root of 138641512 is about 517.5644385985.

It can be divided in two parts, 13864 and 1512, that added together give a square (15376 = 124²).

The spelling of 138641512 in words is "one hundred thirty-eight million, six hundred forty-one thousand, five hundred twelve".