161629628136 has 32 divisors (see below), whose sum is σ = 414994993440. Its totient is φ = 52420419648.

The previous prime is 161629628129. The next prime is 161629628177. The reversal of 161629628136 is 631826926161.

It is a super-2 number, since 2×161629628136² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91006786 + ... + 91008561.

It is an arithmetic number, because the mean of its divisors is an integer number (12968593545).

Almost surely, 2^161629628136 is an apocalyptic number.

It is an amenable number.

161629628136 is an abundant number, since it is smaller than the sum of its proper divisors (253365365304).

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

161629628136 is a wasteful number, since it uses less digits than its factorization.

161629628136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182015393 (or 182015389 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The spelling of 161629628136 in words is "one hundred sixty-one billion, six hundred twenty-nine million, six hundred twenty-eight thousand, one hundred thirty-six".