165504377647 has 8 divisors (see below), whose sum is σ = 189150336000. Its totient is φ = 141859038264.

The previous prime is 165504377579. The next prime is 165504377651. The reversal of 165504377647 is 746773405561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165504377647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165504377147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875754 + ... + 1047832.

It is an arithmetic number, because the mean of its divisors is an integer number (23643792000).

Almost surely, 2^165504377647 is an apocalyptic number.

165504377647 is a deficient number, since it is larger than the sum of its proper divisors (23645958353).

165504377647 is a wasteful number, since it uses less digits than its factorization.

165504377647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309485.

The product of its (nonzero) digits is 14817600, while the sum is 55.

The spelling of 165504377647 in words is "one hundred sixty-five billion, five hundred four million, three hundred seventy-seven thousand, six hundred forty-seven".