25555836587 has 2 divisors, whose sum is σ = 25555836588. Its totient is φ = 25555836586.

The previous prime is 25555836557. The next prime is 25555836611. The reversal of 25555836587 is 78563855552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25555836587 - 2¹⁴ = 25555820203 is a prime.

It is a super-2 number, since 2×25555836587² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25555836557) 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, 12777918293 + 12777918294.

It is an arithmetic number, because the mean of its divisors is an integer number (12777918294).

Almost surely, 2^25555836587 is an apocalyptic number.

25555836587 is a deficient number, since it is larger than the sum of its proper divisors (1).

25555836587 is an equidigital number, since it uses as much as digits as its factorization.

25555836587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400000, while the sum is 59.

The spelling of 25555836587 in words is "twenty-five billion, five hundred fifty-five million, eight hundred thirty-six thousand, five hundred eighty-seven".