25551163369 has 2 divisors, whose sum is σ = 25551163370. Its totient is φ = 25551163368.

The previous prime is 25551163327. The next prime is 25551163373. The reversal of 25551163369 is 96336115552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16032624400 + 9518538969 = 126620^2 + 97563^2 .

It is a cyclic number.

It is not a de Polignac number, because 25551163369 - 2¹³ = 25551155177 is a prime.

It is a super-2 number, since 2×25551163369² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25551163969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12775581684 + 12775581685.

It is an arithmetic number, because the mean of its divisors is an integer number (12775581685).

Almost surely, 2^25551163369 is an apocalyptic number.

It is an amenable number.

25551163369 is a deficient number, since it is larger than the sum of its proper divisors (1).

25551163369 is an equidigital number, since it uses as much as digits as its factorization.

25551163369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 46.

The spelling of 25551163369 in words is "twenty-five billion, five hundred fifty-one million, one hundred sixty-three thousand, three hundred sixty-nine".