161298900 has 108 divisors (see below), whose sum is σ = 577831072. Its totient is φ = 36866880.

The previous prime is 161298887. The next prime is 161298911. The reversal of 161298900 is 9892161.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6502 + ... + 19101.

Almost surely, 2^161298900 is an apocalyptic number.

161298900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161298900 is an abundant number, since it is smaller than the sum of its proper divisors (416532172).

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

161298900 is a wasteful number, since it uses less digits than its factorization.

161298900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25630 (or 25620 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 161298900 is about 12700.3503888672. The cubic root of 161298900 is about 544.3486312336.

The spelling of 161298900 in words is "one hundred sixty-one million, two hundred ninety-eight thousand, nine hundred".