25395105785 has 48 divisors (see below), whose sum is σ = 37545307200. Its totient is φ = 16395571584.

The previous prime is 25395105781. The next prime is 25395105797. The reversal of 25395105785 is 58750159352.

It is not a de Polignac number, because 25395105785 - 2² = 25395105781 is a prime.

It is a super-2 number, since 2×25395105785² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25395105781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 742031 + ... + 775499.

It is an arithmetic number, because the mean of its divisors is an integer number (782193900).

Almost surely, 2^25395105785 is an apocalyptic number.

It is an amenable number.

25395105785 is a deficient number, since it is larger than the sum of its proper divisors (12150201415).

25395105785 is a wasteful number, since it uses less digits than its factorization.

25395105785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33670 (or 33663 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 50.

The spelling of 25395105785 in words is "twenty-five billion, three hundred ninety-five million, one hundred five thousand, seven hundred eighty-five".