786425861 has 16 divisors (see below), whose sum is σ = 881764464. Its totient is φ = 696605184.

The previous prime is 786425807. The next prime is 786425923. The reversal of 786425861 is 168524687.

It can be written as a sum of positive squares in 8 ways, for example, as 100300225 + 686125636 = 10015^2 + 26194^2 .

It is a cyclic number.

It is not a de Polignac number, because 786425861 - 2¹⁸ = 786163717 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (786425261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23915 + ... + 46311.

It is an arithmetic number, because the mean of its divisors is an integer number (55110279).

Almost surely, 2^786425861 is an apocalyptic number.

It is an amenable number.

786425861 is a deficient number, since it is larger than the sum of its proper divisors (95338603).

786425861 is a wasteful number, since it uses less digits than its factorization.

786425861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22520.

The product of its digits is 645120, while the sum is 47.

The square root of 786425861 is about 28043.2854886869. The cubic root of 786425861 is about 923.0373231974.

The spelling of 786425861 in words is "seven hundred eighty-six million, four hundred twenty-five thousand, eight hundred sixty-one".