161580507 has 16 divisors (see below), whose sum is σ = 237358080. Its totient is φ = 96956000.

The previous prime is 161580487. The next prime is 161580511. The reversal of 161580507 is 705085161.

161580507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161580507 - 2¹² = 161576411 is a prime.

It is a super-2 number, since 2×161580507² = 52216520484754098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (161580557) 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, 20907 + ... + 27572.

It is an arithmetic number, because the mean of its divisors is an integer number (14834880).

Almost surely, 2^161580507 is an apocalyptic number.

161580507 is a deficient number, since it is larger than the sum of its proper divisors (75777573).

161580507 is a wasteful number, since it uses less digits than its factorization.

161580507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48594.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 161580507 is about 12711.4321380402. The cubic root of 161580507 is about 544.6652344712.

The spelling of 161580507 in words is "one hundred sixty-one million, five hundred eighty thousand, five hundred seven".