161397586380384 has 144 divisors (see below), whose sum is σ = 459490472663040. Its totient is φ = 53738734452480.

The previous prime is 161397586380383. The next prime is 161397586380389. The reversal of 161397586380384 is 483083685793161.

It is a happy number.

161397586380384 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 9 + 7 + 586 + 3 + 8 + 0 + 38 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161397586380383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 970980609 + ... + 971146815.

It is an arithmetic number, because the mean of its divisors is an integer number (3190906060160).

Almost surely, 2^{161397586380384} is an apocalyptic number.

It is an amenable number.

161397586380384 is an abundant number, since it is smaller than the sum of its proper divisors (298092886282656).

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

161397586380384 is a wasteful number, since it uses less digits than its factorization.

161397586380384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169993 (or 169982 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 72.

The spelling of 161397586380384 in words is "one hundred sixty-one trillion, three hundred ninety-seven billion, five hundred eighty-six million, three hundred eighty thousand, three hundred eighty-four".