161960571599 has 8 divisors (see below), whose sum is σ = 171754374960. Its totient is φ = 152196402816.

The previous prime is 161960571587. The next prime is 161960571601. The reversal of 161960571599 is 995175069161.

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

It is a cyclic number.

It is not a de Polignac number, because 161960571599 - 2²⁸ = 161692136143 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 (161960591599) 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, 7397384 + ... + 7419245.

It is an arithmetic number, because the mean of its divisors is an integer number (21469296870).

Almost surely, 2^161960571599 is an apocalyptic number.

161960571599 is a deficient number, since it is larger than the sum of its proper divisors (9793803361).

161960571599 is a wasteful number, since it uses less digits than its factorization.

161960571599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14817289.

The product of its (nonzero) digits is 4592700, while the sum is 59.

The spelling of 161960571599 in words is "one hundred sixty-one billion, nine hundred sixty million, five hundred seventy-one thousand, five hundred ninety-nine".