161306835726272 has 56 divisors (see below), whose sum is σ = 322275848208000. Its totient is φ = 80103587705856.

The previous prime is 161306835726199. The next prime is 161306835726287. The reversal of 161306835726272 is 272627538603161.

It is a super-2 number, since 2×161306835726272² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89114258 + ... + 90906350.

Almost surely, 2^{161306835726272} is an apocalyptic number.

It is an amenable number.

161306835726272 is a deficient number, since it is larger than the sum of its proper divisors (160969012481728).

161306835726272 is a wasteful number, since it uses less digits than its factorization.

161306835726272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801693 (or 1801683 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 161306835726272 in words is "one hundred sixty-one trillion, three hundred six billion, eight hundred thirty-five million, seven hundred twenty-six thousand, two hundred seventy-two".