161962180973 has 8 divisors (see below), whose sum is σ = 168187891200. Its totient is φ = 155799041040.

The previous prime is 161962180957. The next prime is 161962180993. The reversal of 161962180973 is 379081269161.

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 161962180973 - 2⁴ = 161962180957 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 (161962180943) 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, 15637298 + ... + 15647651.

It is an arithmetic number, because the mean of its divisors is an integer number (21023486400).

Almost surely, 2^161962180973 is an apocalyptic number.

It is an amenable number.

161962180973 is a deficient number, since it is larger than the sum of its proper divisors (6225710227).

161962180973 is a wasteful number, since it uses less digits than its factorization.

161962180973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31285147.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 161962180973 in words is "one hundred sixty-one billion, nine hundred sixty-two million, one hundred eighty thousand, nine hundred seventy-three".