161345158644 has 12 divisors (see below), whose sum is σ = 376472036864. Its totient is φ = 53781719544.

The previous prime is 161345158609. The next prime is 161345158687. The reversal of 161345158644 is 446851543161.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 161345158593 and 161345158602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6722714932 + ... + 6722714955.

Almost surely, 2^161345158644 is an apocalyptic number.

It is an amenable number.

161345158644 is an abundant number, since it is smaller than the sum of its proper divisors (215126878220).

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

161345158644 is a wasteful number, since it uses less digits than its factorization.

161345158644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13445429894 (or 13445429892 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 161345158644 in words is "one hundred sixty-one billion, three hundred forty-five million, one hundred fifty-eight thousand, six hundred forty-four".