25484418787 has 2 divisors, whose sum is σ = 25484418788. Its totient is φ = 25484418786.

The previous prime is 25484418737. The next prime is 25484418793. The reversal of 25484418787 is 78781448452.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25484418787 is a prime.

It is a super-2 number, since 2×25484418787² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25484418727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12742209393 + 12742209394.

It is an arithmetic number, because the mean of its divisors is an integer number (12742209394).

Almost surely, 2^25484418787 is an apocalyptic number.

25484418787 is a deficient number, since it is larger than the sum of its proper divisors (1).

25484418787 is an equidigital number, since it uses as much as digits as its factorization.

25484418787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16056320, while the sum is 58.

The spelling of 25484418787 in words is "twenty-five billion, four hundred eighty-four million, four hundred eighteen thousand, seven hundred eighty-seven".