161012880 has 320 divisors, whose sum is σ = 662814720. Its totient is φ = 35126784.

The previous prime is 161012879. The next prime is 161012893. The reversal of 161012880 is 88210161.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 347529 + ... + 347991.

It is an arithmetic number, because the mean of its divisors is an integer number (2071296).

Almost surely, 2^161012880 is an apocalyptic number.

161012880 is a gapful number since it is divisible by the number (10) 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 161012880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331407360).

161012880 is an abundant number, since it is smaller than the sum of its proper divisors (501801840).

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

161012880 is a wasteful number, since it uses less digits than its factorization.

161012880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 161012880 is about 12689.0850734007. The cubic root of 161012880 is about 544.0266891462.

It can be divided in two parts, 16101 and 2880, that added together give a palindrome (18981).

The spelling of 161012880 in words is "one hundred sixty-one million, twelve thousand, eight hundred eighty".