26780413690 has 32 divisors (see below), whose sum is σ = 48484583424. Its totient is φ = 10650044160.

The previous prime is 26780413687. The next prime is 26780413729. The reversal of 26780413690 is 9631408762.

It is a super-2 number, since 2×26780413690² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26780413690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5053122 + ... + 5058418.

It is an arithmetic number, because the mean of its divisors is an integer number (1515143232).

Almost surely, 2^26780413690 is an apocalyptic number.

26780413690 is a deficient number, since it is larger than the sum of its proper divisors (21704169734).

26780413690 is a wasteful number, since it uses less digits than its factorization.

26780413690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8142.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 26780413690 in words is "twenty-six billion, seven hundred eighty million, four hundred thirteen thousand, six hundred ninety".