165159601494138 has 24 divisors (see below), whose sum is σ = 357891581436948. Its totient is φ = 55046157698112.

The previous prime is 165159601494133. The next prime is 165159601494161. The reversal of 165159601494138 is 831494106951561.

165159601494138 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 5 + 9 + 6 + 0 + 1 + 494 + 138 = 666.

165159601494138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 164122925236209 + 1036676257929 = 12811047^2 + 1018173^2 .

It is not an unprimeable number, because it can be changed into a prime (165159601494133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586755381 + ... + 587036792.

Almost surely, 2^{165159601494138} is an apocalyptic number.

165159601494138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165159601494138 is an abundant number, since it is smaller than the sum of its proper divisors (192731979942810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165159601494138 is a wasteful number, since it uses less digits than its factorization.

165159601494138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173799998 (or 1173799995 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 165159601494138 in words is "one hundred sixty-five trillion, one hundred fifty-nine billion, six hundred one million, four hundred ninety-four thousand, one hundred thirty-eight".