25803257578 has 16 divisors (see below), whose sum is σ = 44236646784. Its totient is φ = 11057916240.

The previous prime is 25803257561. The next prime is 25803257581. The reversal of 25803257578 is 87575230852.

It is a super-2 number, since 2×25803257578² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277851 + ... + 358897.

It is an arithmetic number, because the mean of its divisors is an integer number (2764790424).

Almost surely, 2^25803257578 is an apocalyptic number.

25803257578 is a deficient number, since it is larger than the sum of its proper divisors (18433389206).

25803257578 is a wasteful number, since it uses less digits than its factorization.

25803257578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103797.

The product of its (nonzero) digits is 4704000, while the sum is 52.

The spelling of 25803257578 in words is "twenty-five billion, eight hundred three million, two hundred fifty-seven thousand, five hundred seventy-eight".