25625416049 has 2 divisors, whose sum is σ = 25625416050. Its totient is φ = 25625416048.

The previous prime is 25625415973. The next prime is 25625416153. The reversal of 25625416049 is 94061452652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17267799649 + 8357616400 = 131407^2 + 91420^2 .

It is a cyclic number.

It is not a de Polignac number, because 25625416049 - 2²⁴ = 25608638833 is a prime.

It is not a weakly prime, because it can be changed into another prime (25625416549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812708024 + 12812708025.

It is an arithmetic number, because the mean of its divisors is an integer number (12812708025).

Almost surely, 2^25625416049 is an apocalyptic number.

It is an amenable number.

25625416049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25625416049 is an equidigital number, since it uses as much as digits as its factorization.

25625416049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 25625416049 in words is "twenty-five billion, six hundred twenty-five million, four hundred sixteen thousand, forty-nine".