161213566264 has 32 divisors (see below), whose sum is σ = 305719258320. Its totient is φ = 79692028416.

The previous prime is 161213566249. The next prime is 161213566271. The reversal of 161213566264 is 462665312161.

It is a self number, because there is not a number n which added to its sum of digits gives 161213566264.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134287 + ... + 583489.

Almost surely, 2^161213566264 is an apocalyptic number.

It is an amenable number.

161213566264 is a deficient number, since it is larger than the sum of its proper divisors (144505692056).

161213566264 is a wasteful number, since it uses less digits than its factorization.

161213566264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449719 (or 449715 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The spelling of 161213566264 in words is "one hundred sixty-one billion, two hundred thirteen million, five hundred sixty-six thousand, two hundred sixty-four".