26381865831 has 16 divisors (see below), whose sum is σ = 35299243008. Its totient is φ = 17526276000.

The previous prime is 26381865827. The next prime is 26381865889. The reversal of 26381865831 is 13856818362.

It is a happy number.

It is not a de Polignac number, because 26381865831 - 2² = 26381865827 is a prime.

It is a super-2 number, since 2×26381865831² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26381865131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511806 + ... + 1529156.

It is an arithmetic number, because the mean of its divisors is an integer number (2206202688).

Almost surely, 2^26381865831 is an apocalyptic number.

26381865831 is a deficient number, since it is larger than the sum of its proper divisors (8917377177).

26381865831 is a wasteful number, since it uses less digits than its factorization.

26381865831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19102.

The product of its digits is 1658880, while the sum is 51.

The spelling of 26381865831 in words is "twenty-six billion, three hundred eighty-one million, eight hundred sixty-five thousand, eight hundred thirty-one".