25584783785 has 16 divisors (see below), whose sum is σ = 34041874752. Its totient is φ = 18302078400.

The previous prime is 25584783779. The next prime is 25584783799. The reversal of 25584783785 is 58738748552.

It is not a de Polignac number, because 25584783785 - 2⁸ = 25584783529 is a prime.

It is a super-2 number, since 2×25584783785² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3809579 + ... + 3816288.

It is an arithmetic number, because the mean of its divisors is an integer number (2127617172).

Almost surely, 2^25584783785 is an apocalyptic number.

It is an amenable number.

25584783785 is a deficient number, since it is larger than the sum of its proper divisors (8457090967).

25584783785 is a wasteful number, since it uses less digits than its factorization.

25584783785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625944.

The product of its digits is 75264000, while the sum is 62.

The spelling of 25584783785 in words is "twenty-five billion, five hundred eighty-four million, seven hundred eighty-three thousand, seven hundred eighty-five".