25364864655 has 24 divisors (see below), whose sum is σ = 47347748448. Its totient is φ = 12487317696.

The previous prime is 25364864653. The next prime is 25364864711. The reversal of 25364864655 is 55646846352.

25364864655 is a `hidden beast` number, since 2 + 536 + 48 + 6 + 4 + 65 + 5 = 666.

It is not a de Polignac number, because 25364864655 - 2¹ = 25364864653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25364864653) 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 in 23 ways as a sum of consecutive naturals, for example, 21678787 + ... + 21679956.

It is an arithmetic number, because the mean of its divisors is an integer number (1972822852).

Almost surely, 2^25364864655 is an apocalyptic number.

25364864655 is a deficient number, since it is larger than the sum of its proper divisors (21982883793).

25364864655 is a wasteful number, since it uses less digits than its factorization.

25364864655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43358767 (or 43358764 counting only the distinct ones).

The product of its digits is 20736000, while the sum is 54.

The spelling of 25364864655 in words is "twenty-five billion, three hundred sixty-four million, eight hundred sixty-four thousand, six hundred fifty-five".