26868742690 has 8 divisors (see below), whose sum is σ = 48363736860. Its totient is φ = 10747497072.

The previous prime is 26868742679. The next prime is 26868742699. The reversal of 26868742690 is 9624786862.

26868742690 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26831422809 + 37319881 = 163803^2 + 6109^2 .

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

It is a super-2 number, since 2×26868742690² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26868742699) 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, 1343437125 + ... + 1343437144.

Almost surely, 2^26868742690 is an apocalyptic number.

26868742690 is a deficient number, since it is larger than the sum of its proper divisors (21494994170).

26868742690 is a wasteful number, since it uses less digits than its factorization.

26868742690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686874276.

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 26868742690 in words is "twenty-six billion, eight hundred sixty-eight million, seven hundred forty-two thousand, six hundred ninety".