26308972818 has 12 divisors (see below), whose sum is σ = 57002774478. Its totient is φ = 8769657600.

The previous prime is 26308972799. The next prime is 26308972847. The reversal of 26308972818 is 81827980362.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26010270729 + 298702089 = 161277^2 + 17283^2 .

It is a super-3 number, since 3×26308972818³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730804783 + ... + 730804818.

Almost surely, 2^26308972818 is an apocalyptic number.

26308972818 is an abundant number, since it is smaller than the sum of its proper divisors (30693801660).

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

26308972818 is a wasteful number, since it uses less digits than its factorization.

26308972818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461609609 (or 1461609606 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 26308972818 in words is "twenty-six billion, three hundred eight million, nine hundred seventy-two thousand, eight hundred eighteen".