161394675 has 24 divisors (see below), whose sum is σ = 287367024. Its totient is φ = 79455360.

The previous prime is 161394661. The next prime is 161394697. The reversal of 161394675 is 576493161.

It is not a de Polignac number, because 161394675 - 2⁴ = 161394659 is a prime.

It is a super-2 number, since 2×161394675² = 52096482236711250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81792 + ... + 83741.

It is an arithmetic number, because the mean of its divisors is an integer number (11973626).

Almost surely, 2^161394675 is an apocalyptic number.

161394675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161394675 is a deficient number, since it is larger than the sum of its proper divisors (125972349).

161394675 is a wasteful number, since it uses less digits than its factorization.

161394675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165559 (or 165554 counting only the distinct ones).

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

The square root of 161394675 is about 12704.1203945806. The cubic root of 161394675 is about 544.4563498330.

The spelling of 161394675 in words is "one hundred sixty-one million, three hundred ninety-four thousand, six hundred seventy-five".