161269856 has 48 divisors (see below), whose sum is σ = 347493888. Its totient is φ = 73065600.

The previous prime is 161269847. The next prime is 161269861. The reversal of 161269856 is 658962161.

161269856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151181 + ... + 152243.

It is an arithmetic number, because the mean of its divisors is an integer number (7239456).

Almost surely, 2^161269856 is an apocalyptic number.

161269856 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 161269856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173746944).

161269856 is an abundant number, since it is smaller than the sum of its proper divisors (186224032).

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

161269856 is a wasteful number, since it uses less digits than its factorization.

161269856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1507 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 161269856 is about 12699.2069043701. The cubic root of 161269856 is about 544.3159568825.

The spelling of 161269856 in words is "one hundred sixty-one million, two hundred sixty-nine thousand, eight hundred fifty-six".