25554361687 has 2 divisors, whose sum is σ = 25554361688. Its totient is φ = 25554361686.

The previous prime is 25554361673. The next prime is 25554361691. The reversal of 25554361687 is 78616345552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25554361687 - 2¹¹ = 25554359639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25554361627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777180843 + 12777180844.

It is an arithmetic number, because the mean of its divisors is an integer number (12777180844).

Almost surely, 2^25554361687 is an apocalyptic number.

25554361687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25554361687 is an equidigital number, since it uses as much as digits as its factorization.

25554361687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048000, while the sum is 52.

The spelling of 25554361687 in words is "twenty-five billion, five hundred fifty-four million, three hundred sixty-one thousand, six hundred eighty-seven".