161102970 has 192 divisors, whose sum is σ = 505350144. Its totient is φ = 34836480.

The previous prime is 161102959. The next prime is 161102989. The reversal of 161102970 is 79201161.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1425634 + ... + 1425746.

It is an arithmetic number, because the mean of its divisors is an integer number (2632032).

Almost surely, 2^161102970 is an apocalyptic number.

161102970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161102970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252675072).

161102970 is an abundant number, since it is smaller than the sum of its proper divisors (344247174).

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

161102970 is a wasteful number, since it uses less digits than its factorization.

161102970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 161102970 is about 12692.6344783106. The cubic root of 161102970 is about 544.1281349152.

The spelling of 161102970 in words is "one hundred sixty-one million, one hundred two thousand, nine hundred seventy".