25418932787 has 2 divisors, whose sum is σ = 25418932788. Its totient is φ = 25418932786.

The previous prime is 25418932757. The next prime is 25418932789. The reversal of 25418932787 is 78723981452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25418932787 - 2¹⁸ = 25418670643 is a prime.

It is a super-2 number, since 2×25418932787² (a number of 22 digits) contains 22 as substring.

Together with 25418932789, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25418932789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12709466393 + 12709466394.

It is an arithmetic number, because the mean of its divisors is an integer number (12709466394).

Almost surely, 2^25418932787 is an apocalyptic number.

25418932787 is a deficient number, since it is larger than the sum of its proper divisors (1).

25418932787 is an equidigital number, since it uses as much as digits as its factorization.

25418932787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 56.

The spelling of 25418932787 in words is "twenty-five billion, four hundred eighteen million, nine hundred thirty-two thousand, seven hundred eighty-seven".