161446872 has 16 divisors (see below), whose sum is σ = 403617240. Its totient is φ = 53815616.

The previous prime is 161446847. The next prime is 161446877. The reversal of 161446872 is 278644161.

It is a self number, because there is not a number n which added to its sum of digits gives 161446872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161446877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3363453 + ... + 3363500.

Almost surely, 2^161446872 is an apocalyptic number.

161446872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161446872 is an abundant number, since it is smaller than the sum of its proper divisors (242170368).

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

161446872 is a wasteful number, since it uses less digits than its factorization.

161446872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726962 (or 6726958 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 161446872 is about 12706.1745619994. The cubic root of 161446872 is about 544.5150381075.

The spelling of 161446872 in words is "one hundred sixty-one million, four hundred forty-six thousand, eight hundred seventy-two".