25257678833 has 2 divisors, whose sum is σ = 25257678834. Its totient is φ = 25257678832.

The previous prime is 25257678769. The next prime is 25257678869. The reversal of 25257678833 is 33887675252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13491287104 + 11766391729 = 116152^2 + 108473^2 .

It is a cyclic number.

It is not a de Polignac number, because 25257678833 - 2⁶ = 25257678769 is a prime.

It is not a weakly prime, because it can be changed into another prime (25257678133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12628839416 + 12628839417.

It is an arithmetic number, because the mean of its divisors is an integer number (12628839417).

Almost surely, 2^25257678833 is an apocalyptic number.

It is an amenable number.

25257678833 is a deficient number, since it is larger than the sum of its proper divisors (1).

25257678833 is an equidigital number, since it uses as much as digits as its factorization.

25257678833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16934400, while the sum is 56.

The spelling of 25257678833 in words is "twenty-five billion, two hundred fifty-seven million, six hundred seventy-eight thousand, eight hundred thirty-three".