165519027815 has 4 divisors (see below), whose sum is σ = 198622833384. Its totient is φ = 132415222248.

The previous prime is 165519027781. The next prime is 165519027889. The reversal of 165519027815 is 518720915561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165519027815 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16551902777 + ... + 16551902786.

It is an arithmetic number, because the mean of its divisors is an integer number (49655708346).

Almost surely, 2^165519027815 is an apocalyptic number.

165519027815 is a deficient number, since it is larger than the sum of its proper divisors (33103805569).

165519027815 is an equidigital number, since it uses as much as digits as its factorization.

165519027815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33103805568.

The product of its (nonzero) digits is 756000, while the sum is 50.

The spelling of 165519027815 in words is "one hundred sixty-five billion, five hundred nineteen million, twenty-seven thousand, eight hundred fifteen".