25691367925099 has 2 divisors, whose sum is σ = 25691367925100. Its totient is φ = 25691367925098.

The previous prime is 25691367925021. The next prime is 25691367925103. The reversal of 25691367925099 is 99052976319652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25691367925099 - 2²¹ = 25691365827947 is a prime.

It is not a weakly prime, because it can be changed into another prime (25691367925019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12845683962549 + 12845683962550.

It is an arithmetic number, because the mean of its divisors is an integer number (12845683962550).

Almost surely, 2^{25691367925099} is an apocalyptic number.

25691367925099 is a deficient number, since it is larger than the sum of its proper divisors (1).

25691367925099 is an equidigital number, since it uses as much as digits as its factorization.

25691367925099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 496011600, while the sum is 73.

The spelling of 25691367925099 in words is "twenty-five trillion, six hundred ninety-one billion, three hundred sixty-seven million, nine hundred twenty-five thousand, ninety-nine".