25932778499 has 2 divisors, whose sum is σ = 25932778500. Its totient is φ = 25932778498.

The previous prime is 25932778451. The next prime is 25932778517. The reversal of 25932778499 is 99487723952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25932778499 - 2²⁴ = 25916001283 is a prime.

It is not a weakly prime, because it can be changed into another prime (25932778429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12966389249 + 12966389250.

It is an arithmetic number, because the mean of its divisors is an integer number (12966389250).

Almost surely, 2^25932778499 is an apocalyptic number.

25932778499 is a deficient number, since it is larger than the sum of its proper divisors (1).

25932778499 is an equidigital number, since it uses as much as digits as its factorization.

25932778499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 65.

The spelling of 25932778499 in words is "twenty-five billion, nine hundred thirty-two million, seven hundred seventy-eight thousand, four hundred ninety-nine".