161315749312 has 28 divisors (see below), whose sum is σ = 320205826440. Its totient is φ = 80633966336.

The previous prime is 161315749307. The next prime is 161315749349. The reversal of 161315749312 is 213947513161.

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, 154978 + ... + 588769.

Almost surely, 2^161315749312 is an apocalyptic number.

It is an amenable number.

161315749312 is a deficient number, since it is larger than the sum of its proper divisors (158890077128).

161315749312 is an equidigital number, since it uses as much as digits as its factorization.

161315749312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747148 (or 747138 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The spelling of 161315749312 in words is "one hundred sixty-one billion, three hundred fifteen million, seven hundred forty-nine thousand, three hundred twelve".