161098992 has 120 divisors (see below), whose sum is σ = 475398144. Its totient is φ = 50827392.

The previous prime is 161098961. The next prime is 161098997. The reversal of 161098992 is 299890161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161098997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420433 + ... + 420815.

Almost surely, 2^161098992 is an apocalyptic number.

161098992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161098992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237699072).

161098992 is an abundant number, since it is smaller than the sum of its proper divisors (314299152).

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

161098992 is a wasteful number, since it uses less digits than its factorization.

161098992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The square root of 161098992 is about 12692.4777722870. The cubic root of 161098992 is about 544.1236562899.

The spelling of 161098992 in words is "one hundred sixty-one million, ninety-eight thousand, nine hundred ninety-two".