161902770792 has 64 divisors (see below), whose sum is σ = 482691502080. Its totient is φ = 44246718912.

The previous prime is 161902770791. The next prime is 161902770863. The reversal of 161902770792 is 297077209161.

It is not an unprimeable number, because it can be changed into a prime (161902770791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20946288 + ... + 20954015.

It is an arithmetic number, because the mean of its divisors is an integer number (7542054720).

Almost surely, 2^161902770792 is an apocalyptic number.

161902770792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161902770792 is an abundant number, since it is smaller than the sum of its proper divisors (320788731288).

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

161902770792 is a wasteful number, since it uses less digits than its factorization.

161902770792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41900342 (or 41900338 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 51.

The spelling of 161902770792 in words is "one hundred sixty-one billion, nine hundred two million, seven hundred seventy thousand, seven hundred ninety-two".