25478924651 has 2 divisors, whose sum is σ = 25478924652. Its totient is φ = 25478924650.

The previous prime is 25478924599. The next prime is 25478924663. The reversal of 25478924651 is 15642987452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25478924651 - 2¹⁸ = 25478662507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25478924593 and 25478924602.

It is not a weakly prime, because it can be changed into another prime (25478944651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739462325 + 12739462326.

It is an arithmetic number, because the mean of its divisors is an integer number (12739462326).

Almost surely, 2^25478924651 is an apocalyptic number.

25478924651 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478924651 is an equidigital number, since it uses as much as digits as its factorization.

25478924651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4838400, while the sum is 53.

The spelling of 25478924651 in words is "twenty-five billion, four hundred seventy-eight million, nine hundred twenty-four thousand, six hundred fifty-one".