161388256 has 24 divisors (see below), whose sum is σ = 319692744. Its totient is φ = 80196480.

The previous prime is 161388247. The next prime is 161388257. The reversal of 161388256 is 652883161.

161388256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161388257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10255 + ... + 20686.

It is an arithmetic number, because the mean of its divisors is an integer number (13320531).

Almost surely, 2^161388256 is an apocalyptic number.

161388256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161388256 is a deficient number, since it is larger than the sum of its proper divisors (158304488).

161388256 is a wasteful number, since it uses less digits than its factorization.

161388256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31114 (or 31106 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 161388256 is about 12703.8677574981. The cubic root of 161388256 is about 544.4491316856.

The spelling of 161388256 in words is "one hundred sixty-one million, three hundred eighty-eight thousand, two hundred fifty-six".