165325525761 has 16 divisors (see below), whose sum is σ = 246972777408. Its totient is φ = 97489252800.

The previous prime is 165325525709. The next prime is 165325525789. The reversal of 165325525761 is 167525523561.

It is not a de Polignac number, because 165325525761 - 2⁷ = 165325525633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165325525761.

It is not an unprimeable number, because it can be changed into a prime (165325535761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67699650 + ... + 67702091.

It is an arithmetic number, because the mean of its divisors is an integer number (15435798588).

Almost surely, 2^165325525761 is an apocalyptic number.

165325525761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165325525761 is a deficient number, since it is larger than the sum of its proper divisors (81647251647).

165325525761 is a wasteful number, since it uses less digits than its factorization.

165325525761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135401792.

The product of its digits is 1890000, while the sum is 48.

The spelling of 165325525761 in words is "one hundred sixty-five billion, three hundred twenty-five million, five hundred twenty-five thousand, seven hundred sixty-one".