25787381911 has 8 divisors (see below), whose sum is σ = 26301017840. Its totient is φ = 25278080832.

The previous prime is 25787381881. The next prime is 25787381929. The reversal of 25787381911 is 11918378752.

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

It is a cyclic number.

It is not a de Polignac number, because 25787381911 - 2⁷ = 25787381783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25787381941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071696 + ... + 1095493.

It is an arithmetic number, because the mean of its divisors is an integer number (3287627230).

Almost surely, 2^25787381911 is an apocalyptic number.

25787381911 is a deficient number, since it is larger than the sum of its proper divisors (513635929).

25787381911 is a wasteful number, since it uses less digits than its factorization.

25787381911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167425.

The product of its digits is 846720, while the sum is 52.

The spelling of 25787381911 in words is "twenty-five billion, seven hundred eighty-seven million, three hundred eighty-one thousand, nine hundred eleven".