26821568478 has 8 divisors (see below), whose sum is σ = 53643136968. Its totient is φ = 8940522824.

The previous prime is 26821568461. The next prime is 26821568479. The reversal of 26821568478 is 87486512862.

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

26821568478 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26821568479) 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, 2235130701 + ... + 2235130712.

It is an arithmetic number, because the mean of its divisors is an integer number (6705392121).

Almost surely, 2^26821568478 is an apocalyptic number.

26821568478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26821568478 is a wasteful number, since it uses less digits than its factorization.

26821568478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470261418.

The product of its digits is 10321920, while the sum is 57.

The spelling of 26821568478 in words is "twenty-six billion, eight hundred twenty-one million, five hundred sixty-eight thousand, four hundred seventy-eight".