165585587955 has 32 divisors (see below), whose sum is σ = 279873584640. Its totient is φ = 83366519040.

The previous prime is 165585587953. The next prime is 165585588017. The reversal of 165585587955 is 559785585561.

It is not a de Polignac number, because 165585587955 - 2¹ = 165585587953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165585587955.

It is not an unprimeable number, because it can be changed into a prime (165585587953) 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, 953727 + ... + 1113896.

It is an arithmetic number, because the mean of its divisors is an integer number (8746049520).

Almost surely, 2^165585587955 is an apocalyptic number.

165585587955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165585587955 is a deficient number, since it is larger than the sum of its proper divisors (114287996685).

165585587955 is a wasteful number, since it uses less digits than its factorization.

165585587955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067931.

The product of its digits is 378000000, while the sum is 69.

The spelling of 165585587955 in words is "one hundred sixty-five billion, five hundred eighty-five million, five hundred eighty-seven thousand, nine hundred fifty-five".