26517899819138 has 96 divisors (see below), whose sum is σ = 51466852136448. Its totient is φ = 10146451392000.

The previous prime is 26517899819137. The next prime is 26517899819143. The reversal of 26517899819138 is 83191899871562.

It is a super-2 number, since 2×26517899819138² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (26517899819137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 69991913 + ... + 70369763.

It is an arithmetic number, because the mean of its divisors is an integer number (536113043088).

Almost surely, 2^{26517899819138} is an apocalyptic number.

26517899819138 is a deficient number, since it is larger than the sum of its proper divisors (24948952317310).

26517899819138 is a wasteful number, since it uses less digits than its factorization.

26517899819138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379688 (or 379681 counting only the distinct ones).

The product of its digits is 470292480, while the sum is 77.

The spelling of 26517899819138 in words is "twenty-six trillion, five hundred seventeen billion, eight hundred ninety-nine million, eight hundred nineteen thousand, one hundred thirty-eight".