161927971594 has 8 divisors (see below), whose sum is σ = 242899120800. Its totient is φ = 80961597996.

The previous prime is 161927971559. The next prime is 161927971613. The reversal of 161927971594 is 495179729161.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107894 + ... + 1245505.

It is an arithmetic number, because the mean of its divisors is an integer number (30362390100).

Almost surely, 2^161927971594 is an apocalyptic number.

161927971594 is a deficient number, since it is larger than the sum of its proper divisors (80971149206).

161927971594 is a wasteful number, since it uses less digits than its factorization.

161927971594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387804.

The product of its digits is 8573040, while the sum is 61.

The spelling of 161927971594 in words is "one hundred sixty-one billion, nine hundred twenty-seven million, nine hundred seventy-one thousand, five hundred ninety-four".