161372521475 has 12 divisors (see below), whose sum is σ = 218293011240. Its totient is φ = 117361833600.

The previous prime is 161372521459. The next prime is 161372521579. The reversal of 161372521475 is 574125273161.

It is not a de Polignac number, because 161372521475 - 2⁴ = 161372521459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293404310 + ... + 293404859.

It is an arithmetic number, because the mean of its divisors is an integer number (18191084270).

Almost surely, 2^161372521475 is an apocalyptic number.

161372521475 is a deficient number, since it is larger than the sum of its proper divisors (56920489765).

161372521475 is a wasteful number, since it uses less digits than its factorization.

161372521475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586809190 (or 586809185 counting only the distinct ones).

The product of its digits is 352800, while the sum is 44.

The spelling of 161372521475 in words is "one hundred sixty-one billion, three hundred seventy-two million, five hundred twenty-one thousand, four hundred seventy-five".