165240520455 has 32 divisors (see below), whose sum is σ = 280055384064. Its totient is φ = 82909149696.

The previous prime is 165240520453. The next prime is 165240520513. The reversal of 165240520455 is 554025042561.

It is not a de Polignac number, because 165240520455 - 2¹ = 165240520453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165240520453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471702 + ... + 743628.

It is an arithmetic number, because the mean of its divisors is an integer number (8751730752).

Almost surely, 2^165240520455 is an apocalyptic number.

165240520455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165240520455 is a deficient number, since it is larger than the sum of its proper divisors (114814863609).

165240520455 is a wasteful number, since it uses less digits than its factorization.

165240520455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274335.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 165240520455 in words is "one hundred sixty-five billion, two hundred forty million, five hundred twenty thousand, four hundred fifty-five".