138161151855 has 48 divisors (see below), whose sum is σ = 240817075200. Its totient is φ = 73274756544.

The previous prime is 138161151829. The next prime is 138161151899. The reversal of 138161151855 is 558151161831.

138161151855 is a `hidden beast` number, since 1 + 3 + 81 + 6 + 1 + 1 + 518 + 55 = 666.

It is not a de Polignac number, because 138161151855 - 2¹¹ = 138161149807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138161151855.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22769532 + ... + 22775598.

It is an arithmetic number, because the mean of its divisors is an integer number (5017022400).

Almost surely, 2^138161151855 is an apocalyptic number.

138161151855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138161151855 is a deficient number, since it is larger than the sum of its proper divisors (102655923345).

138161151855 is a wasteful number, since it uses less digits than its factorization.

138161151855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820 (or 8817 counting only the distinct ones).

The product of its digits is 144000, while the sum is 45.

The spelling of 138161151855 in words is "one hundred thirty-eight billion, one hundred sixty-one million, one hundred fifty-one thousand, eight hundred fifty-five".