161251507184 has 20 divisors (see below), whose sum is σ = 315645672384. Its totient is φ = 79794559488.

The previous prime is 161251507181. The next prime is 161251507199. The reversal of 161251507184 is 481705152161.

It is a super-2 number, since 2×161251507184² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161251507181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51948032 + ... + 51951135.

Almost surely, 2^161251507184 is an apocalyptic number.

It is an amenable number.

161251507184 is a deficient number, since it is larger than the sum of its proper divisors (154394165200).

161251507184 is a wasteful number, since it uses less digits than its factorization.

161251507184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103899272 (or 103899266 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 41.

The spelling of 161251507184 in words is "one hundred sixty-one billion, two hundred fifty-one million, five hundred seven thousand, one hundred eighty-four".