25855947353 has 2 divisors, whose sum is σ = 25855947354. Its totient is φ = 25855947352.

The previous prime is 25855947347. The next prime is 25855947401. The reversal of 25855947353 is 35374955852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25272096784 + 583850569 = 158972^2 + 24163^2 .

It is a cyclic number.

It is not a de Polignac number, because 25855947353 - 2¹⁶ = 25855881817 is a prime.

It is a super-2 number, since 2×25855947353² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25855947253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12927973676 + 12927973677.

It is an arithmetic number, because the mean of its divisors is an integer number (12927973677).

Almost surely, 2^25855947353 is an apocalyptic number.

It is an amenable number.

25855947353 is a deficient number, since it is larger than the sum of its proper divisors (1).

25855947353 is an equidigital number, since it uses as much as digits as its factorization.

25855947353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680000, while the sum is 56.

The spelling of 25855947353 in words is "twenty-five billion, eight hundred fifty-five million, nine hundred forty-seven thousand, three hundred fifty-three".