161074872 has 64 divisors (see below), whose sum is σ = 511353600. Its totient is φ = 46020960.

The previous prime is 161074829. The next prime is 161074877. The reversal of 161074872 is 278470161.

It is a super-2 number, since 2×161074872² = 51890228779632768, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161074877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51754 + ... + 54777.

It is an arithmetic number, because the mean of its divisors is an integer number (7989900).

Almost surely, 2^161074872 is an apocalyptic number.

161074872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161074872 is an abundant number, since it is smaller than the sum of its proper divisors (350278728).

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

161074872 is a wasteful number, since it uses less digits than its factorization.

161074872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106553 (or 106543 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 161074872 is about 12691.5275676335. The cubic root of 161074872 is about 544.0964992450.

The spelling of 161074872 in words is "one hundred sixty-one million, seventy-four thousand, eight hundred seventy-two".