161672594 has 16 divisors (see below), whose sum is σ = 251226360. Its totient is φ = 77975040.

The previous prime is 161672591. The next prime is 161672597. The reversal of 161672594 is 495276161.

161672594 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161672591) and next prime (161672597).

It can be written as a sum of positive squares in 4 ways, for example, as 31416025 + 130256569 = 5605^2 + 11413^2 .

It is a super-2 number, since 2×161672594² = 52276055301377672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (161672591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3779 + ... + 18374.

Almost surely, 2^161672594 is an apocalyptic number.

161672594 is a deficient number, since it is larger than the sum of its proper divisors (89553766).

161672594 is a wasteful number, since it uses less digits than its factorization.

161672594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22285.

The product of its digits is 90720, while the sum is 41.

The square root of 161672594 is about 12715.0538339403. The cubic root of 161672594 is about 544.7686856095.

The spelling of 161672594 in words is "one hundred sixty-one million, six hundred seventy-two thousand, five hundred ninety-four".