161626256 has 40 divisors (see below), whose sum is σ = 348084864. Its totient is φ = 72076160.

The previous prime is 161626247. The next prime is 161626277. The reversal of 161626256 is 652626161.

It is a super-2 number, since 2×161626256² = 52246093257155072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665 + ... + 17991.

Almost surely, 2^161626256 is an apocalyptic number.

161626256 is a gapful number since it is divisible by the number (16) 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 161626256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174042432).

161626256 is an abundant number, since it is smaller than the sum of its proper divisors (186458608).

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

161626256 is a wasteful number, since it uses less digits than its factorization.

161626256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17399 (or 17393 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 161626256 is about 12713.2315325412. The cubic root of 161626256 is about 544.7166341087.

It can be divided in two parts, 1616 and 26256, that added together give a palindrome (27872).

The spelling of 161626256 in words is "one hundred sixty-one million, six hundred twenty-six thousand, two hundred fifty-six".