165721672282 has 32 divisors (see below), whose sum is σ = 264894981120. Its totient is φ = 77531534640.

The previous prime is 165721672243. The next prime is 165721672283. The reversal of 165721672282 is 282276127561.

It is not an unprimeable number, because it can be changed into a prime (165721672283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16783807 + ... + 16793677.

It is an arithmetic number, because the mean of its divisors is an integer number (8277968160).

Almost surely, 2^165721672282 is an apocalyptic number.

165721672282 is a deficient number, since it is larger than the sum of its proper divisors (99173308838).

165721672282 is a wasteful number, since it uses less digits than its factorization.

165721672282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15298.

The product of its digits is 1128960, while the sum is 49.

The spelling of 165721672282 in words is "one hundred sixty-five billion, seven hundred twenty-one million, six hundred seventy-two thousand, two hundred eighty-two".