161365228892 has 24 divisors (see below), whose sum is σ = 322839543936. Its totient is φ = 69133151088.

The previous prime is 161365228883. The next prime is 161365228901. The reversal of 161365228892 is 298822563161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161365228883) and next prime (161365228901).

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889538 + ... + 1055465.

It is an arithmetic number, because the mean of its divisors is an integer number (13451647664).

Almost surely, 2^161365228892 is an apocalyptic number.

It is an amenable number.

161365228892 is an abundant number, since it is smaller than the sum of its proper divisors (161474315044).

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

161365228892 is a wasteful number, since it uses less digits than its factorization.

161365228892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947977 (or 1947975 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The spelling of 161365228892 in words is "one hundred sixty-one billion, three hundred sixty-five million, two hundred twenty-eight thousand, eight hundred ninety-two".