26721657368 has 16 divisors (see below), whose sum is σ = 57260694480. Its totient is φ = 11452138848.

The previous prime is 26721657359. The next prime is 26721657421. The reversal of 26721657368 is 86375612762.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238586171 + ... + 238586282.

It is an arithmetic number, because the mean of its divisors is an integer number (3578793405).

Almost surely, 2^26721657368 is an apocalyptic number.

26721657368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26721657368 is an abundant number, since it is smaller than the sum of its proper divisors (30539037112).

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

26721657368 is a wasteful number, since it uses less digits than its factorization.

26721657368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477172466 (or 477172462 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The spelling of 26721657368 in words is "twenty-six billion, seven hundred twenty-one million, six hundred fifty-seven thousand, three hundred sixty-eight".