25553405069 has 2 divisors, whose sum is σ = 25553405070. Its totient is φ = 25553405068.

The previous prime is 25553405047. The next prime is 25553405077. The reversal of 25553405069 is 96050435552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23688288100 + 1865116969 = 153910^2 + 43187^2 .

It is a cyclic number.

It is not a de Polignac number, because 25553405069 - 2⁸ = 25553404813 is a prime.

It is a super-2 number, since 2×25553405069² (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 (25553405569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776702534 + 12776702535.

It is an arithmetic number, because the mean of its divisors is an integer number (12776702535).

Almost surely, 2^25553405069 is an apocalyptic number.

It is an amenable number.

25553405069 is a deficient number, since it is larger than the sum of its proper divisors (1).

25553405069 is an equidigital number, since it uses as much as digits as its factorization.

25553405069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 25553405069 in words is "twenty-five billion, five hundred fifty-three million, four hundred five thousand, sixty-nine".