161250880 has 56 divisors (see below), whose sum is σ = 438838848. Its totient is φ = 55285248.

The previous prime is 161250863. The next prime is 161250883. The reversal of 161250880 is 88052161.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (161250883) 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 7 ways as a sum of consecutive naturals, for example, 33754 + ... + 38233.

It is an arithmetic number, because the mean of its divisors is an integer number (7836408).

Almost surely, 2^161250880 is an apocalyptic number.

161250880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161250880 is an abundant number, since it is smaller than the sum of its proper divisors (277587968).

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

161250880 is an equidigital number, since it uses as much as digits as its factorization.

161250880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72011 (or 72001 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 161250880 is about 12698.4597491192. The cubic root of 161250880 is about 544.2946068609.

The spelling of 161250880 in words is "one hundred sixty-one million, two hundred fifty thousand, eight hundred eighty".