161607251567500 has 30 divisors (see below), whose sum is σ = 353402737733276. Its totient is φ = 64642900626000.

The previous prime is 161607251567497. The next prime is 161607251567501. The reversal of 161607251567500 is 5765152706161.

It is a super-2 number, since 2×161607251567500² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161607251567501) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32321447814 + ... + 32321452813.

Almost surely, 2^{161607251567500} is an apocalyptic number.

161607251567500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161607251567500 is an abundant number, since it is smaller than the sum of its proper divisors (191795486165776).

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

161607251567500 is an equidigital number, since it uses as much as digits as its factorization.

161607251567500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64642900651 (or 64642900634 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 161607251567500 in words is "one hundred sixty-one trillion, six hundred seven billion, two hundred fifty-one million, five hundred sixty-seven thousand, five hundred".