2780326563685 has 24 divisors (see below), whose sum is σ = 3752559185760. Its totient is φ = 1975031113440.

The previous prime is 2780326563671. The next prime is 2780326563709. The reversal of 2780326563685 is 5863656230872.

It is not a de Polignac number, because 2780326563685 - 2⁵ = 2780326563653 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 53410975 + ... + 53463004.

It is an arithmetic number, because the mean of its divisors is an integer number (156356632740).

Almost surely, 2^{2780326563685} is an apocalyptic number.

It is an amenable number.

2780326563685 is a deficient number, since it is larger than the sum of its proper divisors (972232622075).

2780326563685 is a wasteful number, since it uses less digits than its factorization.

2780326563685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106874049 (or 106874038 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 61.

The spelling of 2780326563685 in words is "two trillion, seven hundred eighty billion, three hundred twenty-six million, five hundred sixty-three thousand, six hundred eighty-five".