161600560500 has 96 divisors (see below), whose sum is σ = 470676705408. Its totient is φ = 43084704000.

The previous prime is 161600560493. The next prime is 161600560523. The reversal of 161600560500 is 5065006161.

It is a super-2 number, since 2×161600560500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 11109232 + ... + 11123768.

It is an arithmetic number, because the mean of its divisors is an integer number (4902882348).

Almost surely, 2^161600560500 is an apocalyptic number.

161600560500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161600560500 is an abundant number, since it is smaller than the sum of its proper divisors (309076144908).

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

161600560500 is a wasteful number, since it uses less digits than its factorization.

161600560500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21970 (or 21958 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 161600560500 its reverse (5065006161), we get a palindrome (166665566661).

The spelling of 161600560500 in words is "one hundred sixty-one billion, six hundred million, five hundred sixty thousand, five hundred".