161563836600 has 96 divisors (see below), whose sum is σ = 556497678000. Its totient is φ = 43083688320.

The previous prime is 161563836589. The next prime is 161563836613. The reversal of 161563836600 is 6638365161.

161563836600 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 6 + 3 + 8 + 36 + 600 = 666.

It is a super-2 number, since 2×161563836600² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14954215 + ... + 14965014.

Almost surely, 2^161563836600 is an apocalyptic number.

161563836600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161563836600 is an abundant number, since it is smaller than the sum of its proper divisors (394933841400).

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

161563836600 is a wasteful number, since it uses less digits than its factorization.

161563836600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29919254 (or 29919239 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 161563836600 in words is "one hundred sixty-one billion, five hundred sixty-three million, eight hundred thirty-six thousand, six hundred".