161263260 has 144 divisors (see below), whose sum is σ = 524028960. Its totient is φ = 40020480.

The previous prime is 161263247. The next prime is 161263301. The reversal of 161263260 is 62362161.

161263260 is a `hidden beast` number, since 16 + 12 + 632 + 6 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208234 + ... + 209006.

It is an arithmetic number, because the mean of its divisors is an integer number (3639090).

Almost surely, 2^161263260 is an apocalyptic number.

161263260 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 161263260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262014480).

161263260 is an abundant number, since it is smaller than the sum of its proper divisors (362765700).

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

161263260 is a wasteful number, since it uses less digits than its factorization.

161263260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 161263260 is about 12698.9472004572. The cubic root of 161263260 is about 544.3085358697.

The spelling of 161263260 in words is "one hundred sixty-one million, two hundred sixty-three thousand, two hundred sixty".