25780334587 has 16 divisors (see below), whose sum is σ = 29853089280. Its totient is φ = 21806949888.

The previous prime is 25780334581. The next prime is 25780334597. The reversal of 25780334587 is 78543308752.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25780334587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25780334581) 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 in 15 ways as a sum of consecutive naturals, for example, 83163 + ... + 241819.

It is an arithmetic number, because the mean of its divisors is an integer number (1865818080).

Almost surely, 2^25780334587 is an apocalyptic number.

25780334587 is a deficient number, since it is larger than the sum of its proper divisors (4072754693).

25780334587 is a wasteful number, since it uses less digits than its factorization.

25780334587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158970.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 25780334587 in words is "twenty-five billion, seven hundred eighty million, three hundred thirty-four thousand, five hundred eighty-seven".