25775144687 has 2 divisors, whose sum is σ = 25775144688. Its totient is φ = 25775144686.

The previous prime is 25775144683. The next prime is 25775144699. The reversal of 25775144687 is 78644157752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25775144687 - 2² = 25775144683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25775144683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12887572343 + 12887572344.

It is an arithmetic number, because the mean of its divisors is an integer number (12887572344).

Almost surely, 2^25775144687 is an apocalyptic number.

25775144687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25775144687 is an equidigital number, since it uses as much as digits as its factorization.

25775144687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13171200, while the sum is 56.

The spelling of 25775144687 in words is "twenty-five billion, seven hundred seventy-five million, one hundred forty-four thousand, six hundred eighty-seven".