161793456 has 120 divisors (see below), whose sum is σ = 466063920. Its totient is φ = 48322560.

The previous prime is 161793449. The next prime is 161793487. The reversal of 161793456 is 654397161.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 516756 + ... + 517068.

It is an arithmetic number, because the mean of its divisors is an integer number (3883866).

Almost surely, 2^161793456 is an apocalyptic number.

161793456 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 161793456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233031960).

161793456 is an abundant number, since it is smaller than the sum of its proper divisors (304270464).

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

161793456 is a wasteful number, since it uses less digits than its factorization.

161793456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 418 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 161793456 is about 12719.8056588927. The cubic root of 161793456 is about 544.9044031748.

The spelling of 161793456 in words is "one hundred sixty-one million, seven hundred ninety-three thousand, four hundred fifty-six".