161787072316 has 24 divisors (see below), whose sum is σ = 283462425344. Its totient is φ = 80797869360.

The previous prime is 161787072287. The next prime is 161787072331. The reversal of 161787072316 is 613270787161.

It is a super-2 number, since 2×161787072316² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161787072316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14059021 + ... + 14070523.

Almost surely, 2^161787072316 is an apocalyptic number.

It is an amenable number.

161787072316 is a deficient number, since it is larger than the sum of its proper divisors (121675353028).

161787072316 is a wasteful number, since it uses less digits than its factorization.

161787072316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15361 (or 15359 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 161787072316 in words is "one hundred sixty-one billion, seven hundred eighty-seven million, seventy-two thousand, three hundred sixteen".