25787678747 has 2 divisors, whose sum is σ = 25787678748. Its totient is φ = 25787678746.

The previous prime is 25787678723. The next prime is 25787678773. The reversal of 25787678747 is 74787678752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25787678747 - 2⁸ = 25787678491 is a prime.

It is not a weakly prime, because it can be changed into another prime (25787678797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12893839373 + 12893839374.

It is an arithmetic number, because the mean of its divisors is an integer number (12893839374).

Almost surely, 2^25787678747 is an apocalyptic number.

25787678747 is a deficient number, since it is larger than the sum of its proper divisors (1).

25787678747 is an equidigital number, since it uses as much as digits as its factorization.

25787678747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258155520, while the sum is 68.

The spelling of 25787678747 in words is "twenty-five billion, seven hundred eighty-seven million, six hundred seventy-eight thousand, seven hundred forty-seven".