161772670616 has 64 divisors (see below), whose sum is σ = 322751278080. Its totient is φ = 75753594880.

The previous prime is 161772670601. The next prime is 161772670639. The reversal of 161772670616 is 616076277161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24009200 + ... + 24015936.

It is an arithmetic number, because the mean of its divisors is an integer number (5042988720).

Almost surely, 2^161772670616 is an apocalyptic number.

It is an amenable number.

161772670616 is a deficient number, since it is larger than the sum of its proper divisors (160978607464).

161772670616 is a wasteful number, since it uses less digits than its factorization.

161772670616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604 (or 7600 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

The spelling of 161772670616 in words is "one hundred sixty-one billion, seven hundred seventy-two million, six hundred seventy thousand, six hundred sixteen".