25135388999 has 16 divisors (see below), whose sum is σ = 29102361600. Its totient is φ = 21262703904.

The previous prime is 25135388963. The next prime is 25135389061. The reversal of 25135388999 is 99988353152.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25135388999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25135388909) 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, 1471892 + ... + 1488870.

It is an arithmetic number, because the mean of its divisors is an integer number (1818897600).

Almost surely, 2^25135388999 is an apocalyptic number.

25135388999 is a deficient number, since it is larger than the sum of its proper divisors (3966972601).

25135388999 is a wasteful number, since it uses less digits than its factorization.

25135388999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19742.

The product of its digits is 20995200, while the sum is 62.

The spelling of 25135388999 in words is "twenty-five billion, one hundred thirty-five million, three hundred eighty-eight thousand, nine hundred ninety-nine".