25624894069 has 2 divisors, whose sum is σ = 25624894070. Its totient is φ = 25624894068.

The previous prime is 25624894033. The next prime is 25624894081. The reversal of 25624894069 is 96049842652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19930380625 + 5694513444 = 141175^2 + 75462^2 .

It is a cyclic number.

It is not a de Polignac number, because 25624894069 - 2⁷ = 25624893941 is a prime.

It is a super-2 number, since 2×25624894069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25624894969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12812447034 + 12812447035.

It is an arithmetic number, because the mean of its divisors is an integer number (12812447035).

Almost surely, 2^25624894069 is an apocalyptic number.

It is an amenable number.

25624894069 is a deficient number, since it is larger than the sum of its proper divisors (1).

25624894069 is an equidigital number, since it uses as much as digits as its factorization.

25624894069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 25624894069 in words is "twenty-five billion, six hundred twenty-four million, eight hundred ninety-four thousand, sixty-nine".