165925419225 has 12 divisors (see below), whose sum is σ = 274330026576. Its totient is φ = 88493556880.

The previous prime is 165925419199. The next prime is 165925419229. The reversal of 165925419225 is 522914529561.

It is not a de Polignac number, because 165925419225 - 2¹³ = 165925411033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165925419229) 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, 1106169387 + ... + 1106169536.

It is an arithmetic number, because the mean of its divisors is an integer number (22860835548).

Almost surely, 2^165925419225 is an apocalyptic number.

165925419225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165925419225 is a deficient number, since it is larger than the sum of its proper divisors (108404607351).

165925419225 is a wasteful number, since it uses less digits than its factorization.

165925419225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212338936 (or 2212338931 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 51.

The spelling of 165925419225 in words is "one hundred sixty-five billion, nine hundred twenty-five million, four hundred nineteen thousand, two hundred twenty-five".