26405041278 has 64 divisors (see below), whose sum is σ = 67083489792. Its totient is φ = 6729041280.

The previous prime is 26405041217. The next prime is 26405041319. The reversal of 26405041278 is 87214050462.

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, 514701 + ... + 563672.

It is an arithmetic number, because the mean of its divisors is an integer number (1048179528).

Almost surely, 2^26405041278 is an apocalyptic number.

26405041278 is an abundant number, since it is smaller than the sum of its proper divisors (40678448514).

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

26405041278 is a wasteful number, since it uses less digits than its factorization.

26405041278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078449.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 26405041278 in words is "twenty-six billion, four hundred five million, forty-one thousand, two hundred seventy-eight".