165440170724 has 6 divisors (see below), whose sum is σ = 289520298774. Its totient is φ = 82720085360.

The previous prime is 165440170697. The next prime is 165440170739. The reversal of 165440170724 is 427071044561.

It can be written as a sum of positive squares in only one way, i.e., 87124148224 + 78316022500 = 295168^2 + 279850^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20680021337 + ... + 20680021344.

It is an arithmetic number, because the mean of its divisors is an integer number (48253383129).

Almost surely, 2^165440170724 is an apocalyptic number.

It is an amenable number.

165440170724 is a deficient number, since it is larger than the sum of its proper divisors (124080128050).

165440170724 is a wasteful number, since it uses less digits than its factorization.

165440170724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41360042685 (or 41360042683 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 165440170724 in words is "one hundred sixty-five billion, four hundred forty million, one hundred seventy thousand, seven hundred twenty-four".