26982087643 has 4 divisors (see below), whose sum is σ = 30836671600. Its totient is φ = 23127503688.

The previous prime is 26982087623. The next prime is 26982087661. The reversal of 26982087643 is 34678028962.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26982087643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26982087623) 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 3 ways as a sum of consecutive naturals, for example, 1927291968 + ... + 1927291981.

It is an arithmetic number, because the mean of its divisors is an integer number (7709167900).

Almost surely, 2^26982087643 is an apocalyptic number.

26982087643 is a deficient number, since it is larger than the sum of its proper divisors (3854583957).

26982087643 is an equidigital number, since it uses as much as digits as its factorization.

26982087643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854583956.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 26982087643 in words is "twenty-six billion, nine hundred eighty-two million, eighty-seven thousand, six hundred forty-three".