26447660687 has 8 divisors (see below), whose sum is σ = 30235164672. Its totient is φ = 22662473400.

The previous prime is 26447660683. The next prime is 26447660737. The reversal of 26447660687 is 78606674462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26447660687 - 2² = 26447660683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26447660683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554639 + ... + 600432.

It is an arithmetic number, because the mean of its divisors is an integer number (3779395584).

Almost surely, 2^26447660687 is an apocalyptic number.

26447660687 is a deficient number, since it is larger than the sum of its proper divisors (3787503985).

26447660687 is a wasteful number, since it uses less digits than its factorization.

26447660687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158349.

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 26447660687 in words is "twenty-six billion, four hundred forty-seven million, six hundred sixty thousand, six hundred eighty-seven".