25400234523 has 8 divisors (see below), whose sum is σ = 33885917200. Its totient is φ = 16924020768.

The previous prime is 25400234479. The next prime is 25400234533. The reversal of 25400234523 is 32543200452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25400234523 - 2⁹ = 25400234011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25400234533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2360968 + ... + 2371701.

It is an arithmetic number, because the mean of its divisors is an integer number (4235739650).

Almost surely, 2^25400234523 is an apocalyptic number.

25400234523 is a deficient number, since it is larger than the sum of its proper divisors (8485682677).

25400234523 is a wasteful number, since it uses less digits than its factorization.

25400234523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734461.

The product of its (nonzero) digits is 28800, while the sum is 30.

Adding to 25400234523 its reverse (32543200452), we get a palindrome (57943434975).

The spelling of 25400234523 in words is "twenty-five billion, four hundred million, two hundred thirty-four thousand, five hundred twenty-three".