25028055252979 has 4 divisors (see below), whose sum is σ = 25166331801520. Its totient is φ = 24889778704440.

The previous prime is 25028055252929. The next prime is 25028055253043. The reversal of 25028055252979 is 97925255082052.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25028055252979 - 2³³ = 25019465318387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25028055252929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69138273999 + ... + 69138274360.

It is an arithmetic number, because the mean of its divisors is an integer number (6291582950380).

Almost surely, 2^{25028055252979} is an apocalyptic number.

25028055252979 is a deficient number, since it is larger than the sum of its proper divisors (138276548541).

25028055252979 is a wasteful number, since it uses less digits than its factorization.

25028055252979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138276548540.

The product of its (nonzero) digits is 45360000, while the sum is 61.

The spelling of 25028055252979 in words is "twenty-five trillion, twenty-eight billion, fifty-five million, two hundred fifty-two thousand, nine hundred seventy-nine".