161623036100 has 18 divisors (see below), whose sum is σ = 350721988554. Its totient is φ = 64649214400.

The previous prime is 161623036061. The next prime is 161623036163. The reversal of 161623036100 is 1630326161.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 26047377664 + 135575658436 = 161392^2 + 368206^2 .

It is a super-2 number, since 2×161623036100² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 808115081 + ... + 808115280.

Almost surely, 2^161623036100 is an apocalyptic number.

161623036100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161623036100 is an abundant number, since it is smaller than the sum of its proper divisors (189098952454).

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

161623036100 is a wasteful number, since it uses less digits than its factorization.

161623036100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616230375 (or 1616230368 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 161623036100 in words is "one hundred sixty-one billion, six hundred twenty-three million, thirty-six thousand, one hundred".