26381582457085 has 4 divisors (see below), whose sum is σ = 31657898948508. Its totient is φ = 21105265965664.

The previous prime is 26381582457077. The next prime is 26381582457107. The reversal of 26381582457085 is 58075428518362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8989029345241 + 17392553111844 = 2998171^2 + 4170438^2 .

It is a cyclic number.

It is not a de Polignac number, because 26381582457085 - 2³ = 26381582457077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638158245704 + ... + 2638158245713.

It is an arithmetic number, because the mean of its divisors is an integer number (7914474737127).

Almost surely, 2^{26381582457085} is an apocalyptic number.

It is an amenable number.

26381582457085 is a deficient number, since it is larger than the sum of its proper divisors (5276316491423).

26381582457085 is an equidigital number, since it uses as much as digits as its factorization.

26381582457085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5276316491422.

The product of its (nonzero) digits is 129024000, while the sum is 64.

The spelling of 26381582457085 in words is "twenty-six trillion, three hundred eighty-one billion, five hundred eighty-two million, four hundred fifty-seven thousand, eighty-five".