165725239407 has 96 divisors (see below), whose sum is σ = 283117963968. Its totient is φ = 85446918144.

The previous prime is 165725239327. The next prime is 165725239481. The reversal of 165725239407 is 704932527561.

It is not a de Polignac number, because 165725239407 - 2¹² = 165725235311 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165725239407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165725239487) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15758583 + ... + 15769095.

It is an arithmetic number, because the mean of its divisors is an integer number (2949145458).

Almost surely, 2^165725239407 is an apocalyptic number.

165725239407 is a deficient number, since it is larger than the sum of its proper divisors (117392724561).

165725239407 is a wasteful number, since it uses less digits than its factorization.

165725239407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10729 (or 10722 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 165725239407 in words is "one hundred sixty-five billion, seven hundred twenty-five million, two hundred thirty-nine thousand, four hundred seven".