161456504 has 64 divisors (see below), whose sum is σ = 347086080. Its totient is φ = 69696000.

The previous prime is 161456501. The next prime is 161456513. The reversal of 161456504 is 405654161.

161456504 is digitally balanced in base 3, 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 (161456501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 487619 + ... + 487949.

It is an arithmetic number, because the mean of its divisors is an integer number (5423220).

Almost surely, 2^161456504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161456504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173543040).

161456504 is an abundant number, since it is smaller than the sum of its proper divisors (185629576).

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

161456504 is a wasteful number, since it uses less digits than its factorization.

161456504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 161456504 is about 12706.5535846665. The cubic root of 161456504 is about 544.5258665707.

The spelling of 161456504 in words is "one hundred sixty-one million, four hundred fifty-six thousand, five hundred four".