25797451049 has 2 divisors, whose sum is σ = 25797451050. Its totient is φ = 25797451048.

The previous prime is 25797451019. The next prime is 25797451079. The reversal of 25797451049 is 94015479752.

It is a balanced prime because it is at equal distance from previous prime (25797451019) and next prime (25797451079).

It can be written as a sum of positive squares in only one way, i.e., 25685831824 + 111619225 = 160268^2 + 10565^2 .

It is a cyclic number.

It is not a de Polignac number, because 25797451049 - 2¹² = 25797446953 is a prime.

It is not a weakly prime, because it can be changed into another prime (25797451019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12898725524 + 12898725525.

It is an arithmetic number, because the mean of its divisors is an integer number (12898725525).

Almost surely, 2^25797451049 is an apocalyptic number.

It is an amenable number.

25797451049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25797451049 is an equidigital number, since it uses as much as digits as its factorization.

25797451049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The spelling of 25797451049 in words is "twenty-five billion, seven hundred ninety-seven million, four hundred fifty-one thousand, forty-nine".