25640119479 has 32 divisors (see below), whose sum is σ = 38896542720. Its totient is φ = 14910279552.

The previous prime is 25640119471. The next prime is 25640119553. The reversal of 25640119479 is 97491104652.

It is a happy number.

It is not a de Polignac number, because 25640119479 - 2³ = 25640119471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640119471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188017 + ... + 294330.

It is an arithmetic number, because the mean of its divisors is an integer number (1215516960).

Almost surely, 2^25640119479 is an apocalyptic number.

25640119479 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25640119479 is a deficient number, since it is larger than the sum of its proper divisors (13256423241).

25640119479 is a wasteful number, since it uses less digits than its factorization.

25640119479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482439.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 25640119479 in words is "twenty-five billion, six hundred forty million, one hundred nineteen thousand, four hundred seventy-nine".