25540478786 has 8 divisors (see below), whose sum is σ = 38433904704. Its totient is φ = 12729177220.

The previous prime is 25540478749. The next prime is 25540478839. The reversal of 25540478786 is 68787404552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20530310 + ... + 20531553.

It is an arithmetic number, because the mean of its divisors is an integer number (4804238088).

Almost surely, 2^25540478786 is an apocalyptic number.

25540478786 is a deficient number, since it is larger than the sum of its proper divisors (12893425918).

25540478786 is a wasteful number, since it uses less digits than its factorization.

25540478786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41062176.

The product of its (nonzero) digits is 15052800, while the sum is 56.

The spelling of 25540478786 in words is "twenty-five billion, five hundred forty million, four hundred seventy-eight thousand, seven hundred eighty-six".