161475539187 has 8 divisors (see below), whose sum is σ = 216138465936. Its totient is φ = 107231485952.

The previous prime is 161475539149. The next prime is 161475539201. The reversal of 161475539187 is 781935574161.

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

It is not a de Polignac number, because 161475539187 - 2²⁷ = 161341321459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161475539387) 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, 104717478 + ... + 104719019.

It is an arithmetic number, because the mean of its divisors is an integer number (27017308242).

Almost surely, 2^161475539187 is an apocalyptic number.

161475539187 is a deficient number, since it is larger than the sum of its proper divisors (54662926749).

161475539187 is a wasteful number, since it uses less digits than its factorization.

161475539187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209436757.

The product of its digits is 6350400, while the sum is 57.

The spelling of 161475539187 in words is "one hundred sixty-one billion, four hundred seventy-five million, five hundred thirty-nine thousand, one hundred eighty-seven".