161593686720 has 224 divisors, whose sum is σ = 600070732800. Its totient is φ = 40823626752.

The previous prime is 161593686703. The next prime is 161593686769. The reversal of 161593686720 is 27686395161.

161593686720 is a `hidden beast` number, since 161 + 59 + 368 + 6 + 72 + 0 = 666.

It is a super-2 number, since 2×161593686720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328024 + ... + 656343.

It is an arithmetic number, because the mean of its divisors is an integer number (2678887200).

Almost surely, 2^161593686720 is an apocalyptic number.

161593686720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161593686720 is an abundant number, since it is smaller than the sum of its proper divisors (438477046080).

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

161593686720 is a wasteful number, since it uses less digits than its factorization.

161593686720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984412 (or 984396 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 161593686720 in words is "one hundred sixty-one billion, five hundred ninety-three million, six hundred eighty-six thousand, seven hundred twenty".