26778106838 has 64 divisors (see below), whose sum is σ = 49189994496. Its totient is φ = 10691136000.

The previous prime is 26778106793. The next prime is 26778106843. The reversal of 26778106838 is 83860187762.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1233518 + ... + 1255038.

It is an arithmetic number, because the mean of its divisors is an integer number (768593664).

Almost surely, 2^26778106838 is an apocalyptic number.

26778106838 is a deficient number, since it is larger than the sum of its proper divisors (22411887658).

26778106838 is a wasteful number, since it uses less digits than its factorization.

26778106838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21669.

The product of its (nonzero) digits is 5419008, while the sum is 56.

The spelling of 26778106838 in words is "twenty-six billion, seven hundred seventy-eight million, one hundred six thousand, eight hundred thirty-eight".