161501775364 has 24 divisors (see below), whose sum is σ = 284696193600. Its totient is φ = 80160148320.

The previous prime is 161501775349. The next prime is 161501775371. The reversal of 161501775364 is 463577105161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7100442 + ... + 7123150.

It is an arithmetic number, because the mean of its divisors is an integer number (11862341400).

Almost surely, 2^161501775364 is an apocalyptic number.

It is an amenable number.

161501775364 is a deficient number, since it is larger than the sum of its proper divisors (123194418236).

161501775364 is a wasteful number, since it uses less digits than its factorization.

161501775364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35643 (or 35641 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 161501775364 in words is "one hundred sixty-one billion, five hundred one million, seven hundred seventy-five thousand, three hundred sixty-four".