25340431523 has 16 divisors (see below), whose sum is σ = 29950943616. Its totient is φ = 21177421440.

The previous prime is 25340431513. The next prime is 25340431531. The reversal of 25340431523 is 32513404352.

It is a cyclic number.

It is not a de Polignac number, because 25340431523 - 2¹⁰ = 25340430499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25340431523.

It is not an unprimeable number, because it can be changed into a prime (25340431513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1567661 + ... + 1583742.

It is an arithmetic number, because the mean of its divisors is an integer number (1871933976).

Almost surely, 2^25340431523 is an apocalyptic number.

25340431523 is a deficient number, since it is larger than the sum of its proper divisors (4610512093).

25340431523 is a wasteful number, since it uses less digits than its factorization.

25340431523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151474.

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 25340431523 its reverse (32513404352), we get a palindrome (57853835875).

The spelling of 25340431523 in words is "twenty-five billion, three hundred forty million, four hundred thirty-one thousand, five hundred twenty-three".