161887520894 has 32 divisors (see below), whose sum is σ = 266105198592. Its totient is φ = 73252872000.

The previous prime is 161887520887. The next prime is 161887520909. The reversal of 161887520894 is 498025788161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6707789 + ... + 6731879.

It is an arithmetic number, because the mean of its divisors is an integer number (8315787456).

Almost surely, 2^161887520894 is an apocalyptic number.

161887520894 is a deficient number, since it is larger than the sum of its proper divisors (104217677698).

161887520894 is a wasteful number, since it uses less digits than its factorization.

161887520894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25472.

The product of its (nonzero) digits is 7741440, while the sum is 59.

The spelling of 161887520894 in words is "one hundred sixty-one billion, eight hundred eighty-seven million, five hundred twenty thousand, eight hundred ninety-four".