25535404909 has 16 divisors (see below), whose sum is σ = 30435306496. Its totient is φ = 20963059200.

The previous prime is 25535404903. The next prime is 25535404913. The reversal of 25535404909 is 90940453552.

It is a cyclic number.

It is not a de Polignac number, because 25535404909 - 2⁵ = 25535404877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25535404903) 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, 585522 + ... + 627619.

It is an arithmetic number, because the mean of its divisors is an integer number (1902206656).

Almost surely, 2^25535404909 is an apocalyptic number.

It is an amenable number.

25535404909 is a deficient number, since it is larger than the sum of its proper divisors (4899901587).

25535404909 is a wasteful number, since it uses less digits than its factorization.

25535404909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213276.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 25535404909 in words is "twenty-five billion, five hundred thirty-five million, four hundred four thousand, nine hundred nine".