25079125809 has 16 divisors (see below), whose sum is σ = 34144405632. Its totient is φ = 16368014208.

The previous prime is 25079125739. The next prime is 25079125817. The reversal of 25079125809 is 90852197052.

It is not a de Polignac number, because 25079125809 - 2¹¹ = 25079123761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25079125889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99909 + ... + 245234.

It is an arithmetic number, because the mean of its divisors is an integer number (2134025352).

Almost surely, 2^25079125809 is an apocalyptic number.

It is an amenable number.

25079125809 is a deficient number, since it is larger than the sum of its proper divisors (9065279823).

25079125809 is a wasteful number, since it uses less digits than its factorization.

25079125809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345656.

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 25079125809 in words is "twenty-five billion, seventy-nine million, one hundred twenty-five thousand, eight hundred nine".