26081582987 has 4 divisors (see below), whose sum is σ = 27215564880. Its totient is φ = 24947601096.

The previous prime is 26081582983. The next prime is 26081583023. The reversal of 26081582987 is 78928518062.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 26081582987 - 2² = 26081582983 is a prime.

It is a super-2 number, since 2×26081582987² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26081582981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566990912 + ... + 566990957.

It is an arithmetic number, because the mean of its divisors is an integer number (6803891220).

Almost surely, 2^26081582987 is an apocalyptic number.

26081582987 is a deficient number, since it is larger than the sum of its proper divisors (1133981893).

26081582987 is a wasteful number, since it uses less digits than its factorization.

26081582987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133981892.

The product of its (nonzero) digits is 3870720, while the sum is 56.

The spelling of 26081582987 in words is "twenty-six billion, eighty-one million, five hundred eighty-two thousand, nine hundred eighty-seven".