161812479 has 16 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 105695520.

The previous prime is 161812463. The next prime is 161812517. The reversal of 161812479 is 974218161.

It is not a de Polignac number, because 161812479 - 2⁴ = 161812463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161812439) 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, 33297 + ... + 37845.

It is an arithmetic number, because the mean of its divisors is an integer number (13759200).

Almost surely, 2^161812479 is an apocalyptic number.

161812479 is a deficient number, since it is larger than the sum of its proper divisors (58334721).

161812479 is a wasteful number, since it uses less digits than its factorization.

161812479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790.

The product of its digits is 24192, while the sum is 39.

The square root of 161812479 is about 12720.5534077728. The cubic root of 161812479 is about 544.9257582005.

The spelling of 161812479 in words is "one hundred sixty-one million, eight hundred twelve thousand, four hundred seventy-nine".