26221063587 has 4 divisors (see below), whose sum is σ = 34961418120. Its totient is φ = 17480709056.

The previous prime is 26221063567. The next prime is 26221063651. The reversal of 26221063587 is 78536012262.

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 26221063587 - 2²⁰ = 26220015011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26221063507) 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, 4370177262 + ... + 4370177267.

It is an arithmetic number, because the mean of its divisors is an integer number (8740354530).

Almost surely, 2^26221063587 is an apocalyptic number.

26221063587 is a deficient number, since it is larger than the sum of its proper divisors (8740354533).

26221063587 is an equidigital number, since it uses as much as digits as its factorization.

26221063587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8740354532.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 26221063587 in words is "twenty-six billion, two hundred twenty-one million, sixty-three thousand, five hundred eighty-seven".