161442605556864 has 96 divisors (see below), whose sum is σ = 464875376696640. Its totient is φ = 53778586314240.

The previous prime is 161442605556833. The next prime is 161442605556901. The reversal of 161442605556864 is 468655506244161.

161442605556864 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 4 + 2 + 6 + 0 + 5 + 5 + 568 + 64 = 666.

161442605556864 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44632972 + ... + 48114315.

It is an arithmetic number, because the mean of its divisors is an integer number (4842451840590).

Almost surely, 2^{161442605556864} is an apocalyptic number.

It is an amenable number.

161442605556864 is an abundant number, since it is smaller than the sum of its proper divisors (303432771139776).

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

161442605556864 is a wasteful number, since it uses less digits than its factorization.

161442605556864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92748818 (or 92748803 counting only the distinct ones).

The product of its (nonzero) digits is 165888000, while the sum is 63.

The spelling of 161442605556864 in words is "one hundred sixty-one trillion, four hundred forty-two billion, six hundred five million, five hundred fifty-six thousand, eight hundred sixty-four".