26993894356 has 36 divisors (see below), whose sum is σ = 55918388596. Its totient is φ = 11326106880.

The previous prime is 26993894353. The next prime is 26993894357. The reversal of 26993894356 is 65349839962.

It can be written as a sum of positive squares in 2 ways, for example, as 12085484356 + 14908410000 = 109934^2 + 122100^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26993894351) 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 11 ways as a sum of consecutive naturals, for example, 2138805 + ... + 2151388.

Almost surely, 2^26993894356 is an apocalyptic number.

26993894356 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

26993894356 is an abundant number, since it is smaller than the sum of its proper divisors (28924494240).

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

26993894356 is a wasteful number, since it uses less digits than its factorization.

26993894356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290232 (or 4290219 counting only the distinct ones).

The product of its digits is 75582720, while the sum is 64.

The spelling of 26993894356 in words is "twenty-six billion, nine hundred ninety-three million, eight hundred ninety-four thousand, three hundred fifty-six".