25577612479 has 2 divisors, whose sum is σ = 25577612480. Its totient is φ = 25577612478.

The previous prime is 25577612477. The next prime is 25577612509. The reversal of 25577612479 is 97421677552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25577612479 - 2¹ = 25577612477 is a prime.

Together with 25577612477, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25577612477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788806239 + 12788806240.

It is an arithmetic number, because the mean of its divisors is an integer number (12788806240).

Almost surely, 2^25577612479 is an apocalyptic number.

25577612479 is a deficient number, since it is larger than the sum of its proper divisors (1).

25577612479 is an equidigital number, since it uses as much as digits as its factorization.

25577612479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7408800, while the sum is 55.

The spelling of 25577612479 in words is "twenty-five billion, five hundred seventy-seven million, six hundred twelve thousand, four hundred seventy-nine".