8109786405 has 24 divisors (see below), whose sum is σ = 15094134432. Its totient is φ = 3707330592.

The previous prime is 8109786401. The next prime is 8109786427. The reversal of 8109786405 is 5046879018.

It is not a de Polignac number, because 8109786405 - 2² = 8109786401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109786401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5516127 + ... + 5517596.

It is an arithmetic number, because the mean of its divisors is an integer number (628922268).

Almost surely, 2^8109786405 is an apocalyptic number.

It is an amenable number.

8109786405 is a deficient number, since it is larger than the sum of its proper divisors (6984348027).

8109786405 is a wasteful number, since it uses less digits than its factorization.

8109786405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11033745 (or 11033738 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 8109786405 is about 90054.3525044737. The cubic root of 8109786405 is about 2009.1073323823.

The spelling of 8109786405 in words is "eight billion, one hundred nine million, seven hundred eighty-six thousand, four hundred five".