786402253409 has 4 divisors (see below), whose sum is σ = 807656368404. Its totient is φ = 765148138416.

The previous prime is 786402253397. The next prime is 786402253463. The reversal of 786402253409 is 904352204687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 316937472784 + 469464780625 = 562972^2 + 685175^2 .

It is a cyclic number.

It is not a de Polignac number, because 786402253409 - 2³² = 782107286113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (786402252409) 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 3 ways as a sum of consecutive naturals, for example, 10627057442 + ... + 10627057515.

It is an arithmetic number, because the mean of its divisors is an integer number (201914092101).

Almost surely, 2^786402253409 is an apocalyptic number.

It is an amenable number.

786402253409 is a deficient number, since it is larger than the sum of its proper divisors (21254114995).

786402253409 is a wasteful number, since it uses less digits than its factorization.

786402253409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21254114994.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 786402253409 in words is "seven hundred eighty-six billion, four hundred two million, two hundred fifty-three thousand, four hundred nine".