165601210527 has 12 divisors (see below), whose sum is σ = 240090977880. Its totient is φ = 109990393488.

The previous prime is 165601210519. The next prime is 165601210547. The reversal of 165601210527 is 725012106561.

165601210527 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 0 + 121 + 0 + 527 = 666.

It is not a de Polignac number, because 165601210527 - 2³ = 165601210519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165601210491 and 165601210500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165601210547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34198573 + ... + 34203414.

It is an arithmetic number, because the mean of its divisors is an integer number (20007581490).

Almost surely, 2^165601210527 is an apocalyptic number.

165601210527 is a deficient number, since it is larger than the sum of its proper divisors (74489767353).

165601210527 is a wasteful number, since it uses less digits than its factorization.

165601210527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68402262 (or 68402259 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 165601210527 in words is "one hundred sixty-five billion, six hundred one million, two hundred ten thousand, five hundred twenty-seven".