161311375479 has 8 divisors (see below), whose sum is σ = 215095979392. Its totient is φ = 107533844280.

The previous prime is 161311375457. The next prime is 161311375499. The reversal of 161311375479 is 974573113161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161311375479 - 2⁵ = 161311375447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161311375499) 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, 1714729 + ... + 1806354.

It is an arithmetic number, because the mean of its divisors is an integer number (26886997424).

Almost surely, 2^161311375479 is an apocalyptic number.

161311375479 is a deficient number, since it is larger than the sum of its proper divisors (53784603913).

161311375479 is a wasteful number, since it uses less digits than its factorization.

161311375479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536357.

The product of its digits is 476280, while the sum is 48.

The spelling of 161311375479 in words is "one hundred sixty-one billion, three hundred eleven million, three hundred seventy-five thousand, four hundred seventy-nine".