165520707272 has 32 divisors (see below), whose sum is σ = 317154165120. Its totient is φ = 80948481600.

The previous prime is 165520707259. The next prime is 165520707301. The reversal of 165520707272 is 272707025561.

It is a super-2 number, since 2×165520707272² (a number of 23 digits) contains 22 as substring.

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, 462647 + ... + 738297.

It is an arithmetic number, because the mean of its divisors is an integer number (9911067660).

Almost surely, 2^165520707272 is an apocalyptic number.

It is an amenable number.

165520707272 is a deficient number, since it is larger than the sum of its proper divisors (151633457848).

165520707272 is a wasteful number, since it uses less digits than its factorization.

165520707272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277301 (or 277297 counting only the distinct ones).

The product of its (nonzero) digits is 411600, while the sum is 44.

The spelling of 165520707272 in words is "one hundred sixty-five billion, five hundred twenty million, seven hundred seven thousand, two hundred seventy-two".