161568972747134 has 24 divisors (see below), whose sum is σ = 255820348083960. Its totient is φ = 76520671522992.

The previous prime is 161568972747107. The next prime is 161568972747181. The reversal of 161568972747134 is 431747279865161.

It is a super-2 number, since 2×161568972747134² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (71) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12934709 + ... + 22145984.

It is an arithmetic number, because the mean of its divisors is an integer number (10659181170165).

Almost surely, 2^{161568972747134} is an apocalyptic number.

161568972747134 is a deficient number, since it is larger than the sum of its proper divisors (94251375336826).

161568972747134 is a wasteful number, since it uses less digits than its factorization.

161568972747134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35087112 (or 35087093 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 71.

The spelling of 161568972747134 in words is "one hundred sixty-one trillion, five hundred sixty-eight billion, nine hundred seventy-two million, seven hundred forty-seven thousand, one hundred thirty-four".