25499899459 has 2 divisors, whose sum is σ = 25499899460. Its totient is φ = 25499899458.

The previous prime is 25499899409. The next prime is 25499899489. The reversal of 25499899459 is 95499899452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25499899459 - 2⁷ = 25499899331 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25499899391 and 25499899400.

It is not a weakly prime, because it can be changed into another prime (25499899409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12749949729 + 12749949730.

It is an arithmetic number, because the mean of its divisors is an integer number (12749949730).

Almost surely, 2^25499899459 is an apocalyptic number.

25499899459 is a deficient number, since it is larger than the sum of its proper divisors (1).

25499899459 is an equidigital number, since it uses as much as digits as its factorization.

25499899459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 377913600, while the sum is 73.

The spelling of 25499899459 in words is "twenty-five billion, four hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred fifty-nine".