138661835332 has 24 divisors (see below), whose sum is σ = 247256235072. Its totient is φ = 68017404000.

The previous prime is 138661835239. The next prime is 138661835339. The reversal of 138661835332 is 233538166831.

138661835332 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138661835339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4630207 + ... + 4660057.

It is an arithmetic number, because the mean of its divisors is an integer number (10302343128).

Almost surely, 2^138661835332 is an apocalyptic number.

It is an amenable number.

138661835332 is a deficient number, since it is larger than the sum of its proper divisors (108594399740).

138661835332 is a wasteful number, since it uses less digits than its factorization.

138661835332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51819 (or 51817 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The spelling of 138661835332 in words is "one hundred thirty-eight billion, six hundred sixty-one million, eight hundred thirty-five thousand, three hundred thirty-two".