25710999049 has 2 divisors, whose sum is σ = 25710999050. Its totient is φ = 25710999048.

The previous prime is 25710999031. The next prime is 25710999089. The reversal of 25710999049 is 94099901752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17204257225 + 8506741824 = 131165^2 + 92232^2 .

It is a cyclic number.

It is not a de Polignac number, because 25710999049 - 2¹⁷ = 25710867977 is a prime.

It is a super-2 number, since 2×25710999049² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25710999089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12855499524 + 12855499525.

It is an arithmetic number, because the mean of its divisors is an integer number (12855499525).

Almost surely, 2^25710999049 is an apocalyptic number.

It is an amenable number.

25710999049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25710999049 is an equidigital number, since it uses as much as digits as its factorization.

25710999049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The spelling of 25710999049 in words is "twenty-five billion, seven hundred ten million, nine hundred ninety-nine thousand, forty-nine".