161391316092 has 12 divisors (see below), whose sum is σ = 376579737576. Its totient is φ = 53797105360.

The previous prime is 161391316081. The next prime is 161391316109. The reversal of 161391316092 is 290613193161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6724638159 + ... + 6724638182.

It is an arithmetic number, because the mean of its divisors is an integer number (31381644798).

Almost surely, 2^161391316092 is an apocalyptic number.

161391316092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161391316092 is an abundant number, since it is smaller than the sum of its proper divisors (215188421484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161391316092 is a wasteful number, since it uses less digits than its factorization.

161391316092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13449276348 (or 13449276346 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 161391316092 in words is "one hundred sixty-one billion, three hundred ninety-one million, three hundred sixteen thousand, ninety-two".