161492031772 has 12 divisors (see below), whose sum is σ = 288624057120. Its totient is φ = 79028015456.

The previous prime is 161492031737. The next prime is 161492031781. The reversal of 161492031772 is 277130294161.

161492031772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429499897 + ... + 429500272.

It is an arithmetic number, because the mean of its divisors is an integer number (24052004760).

Almost surely, 2^161492031772 is an apocalyptic number.

It is an amenable number.

161492031772 is a deficient number, since it is larger than the sum of its proper divisors (127132025348).

161492031772 is a wasteful number, since it uses less digits than its factorization.

161492031772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859000220 (or 859000218 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The spelling of 161492031772 in words is "one hundred sixty-one billion, four hundred ninety-two million, thirty-one thousand, seven hundred seventy-two".