26405786744643 has 16 divisors (see below), whose sum is σ = 35950524219936. Its totient is φ = 17235973969920.

The previous prime is 26405786744527. The next prime is 26405786744653. The reversal of 26405786744643 is 34644768750462.

It is not a de Polignac number, because 26405786744643 - 2¹⁰ = 26405786743619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26405786744653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440022438 + ... + 440082443.

It is an arithmetic number, because the mean of its divisors is an integer number (2246907763746).

Almost surely, 2^{26405786744643} is an apocalyptic number.

26405786744643 is a deficient number, since it is larger than the sum of its proper divisors (9544737475293).

26405786744643 is a wasteful number, since it uses less digits than its factorization.

26405786744643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880105094.

The product of its (nonzero) digits is 650280960, while the sum is 66.

The spelling of 26405786744643 in words is "twenty-six trillion, four hundred five billion, seven hundred eighty-six million, seven hundred forty-four thousand, six hundred forty-three".