25355782519 has 2 divisors, whose sum is σ = 25355782520. Its totient is φ = 25355782518.

The previous prime is 25355782481. The next prime is 25355782553. The reversal of 25355782519 is 91528755352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25355782519 - 2⁷ = 25355782391 is a prime.

It is a super-2 number, since 2×25355782519² (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 (25355782559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12677891259 + 12677891260.

It is an arithmetic number, because the mean of its divisors is an integer number (12677891260).

Almost surely, 2^25355782519 is an apocalyptic number.

25355782519 is a deficient number, since it is larger than the sum of its proper divisors (1).

25355782519 is an equidigital number, since it uses as much as digits as its factorization.

25355782519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780000, while the sum is 52.

The spelling of 25355782519 in words is "twenty-five billion, three hundred fifty-five million, seven hundred eighty-two thousand, five hundred nineteen".