25125126405 has 16 divisors (see below), whose sum is σ = 40203585600. Its totient is φ = 13398939648.

The previous prime is 25125126391. The next prime is 25125126413. The reversal of 25125126405 is 50462152152.

It is not a de Polignac number, because 25125126405 - 2⁵ = 25125126373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132549 + ... + 260421.

It is an arithmetic number, because the mean of its divisors is an integer number (2512724100).

Almost surely, 2^25125126405 is an apocalyptic number.

It is an amenable number.

25125126405 is a deficient number, since it is larger than the sum of its proper divisors (15078459195).

25125126405 is a wasteful number, since it uses less digits than its factorization.

25125126405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140980.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 25125126405 its reverse (50462152152), we get a palindrome (75587278557).

The spelling of 25125126405 in words is "twenty-five billion, one hundred twenty-five million, one hundred twenty-six thousand, four hundred five".