782656412513 has 4 divisors (see below), whose sum is σ = 801745593348. Its totient is φ = 763567231680.

The previous prime is 782656412441. The next prime is 782656412539. The reversal of 782656412513 is 315214656287.

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 118744335649 + 663912076864 = 344593^2 + 814808^2 .

It is a cyclic number.

It is not a de Polignac number, because 782656412513 - 2⁸ = 782656412257 is a prime.

It is a super-2 number, since 2×782656412513² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (782656432513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9544590356 + ... + 9544590437.

It is an arithmetic number, because the mean of its divisors is an integer number (200436398337).

Almost surely, 2^782656412513 is an apocalyptic number.

It is an amenable number.

782656412513 is a deficient number, since it is larger than the sum of its proper divisors (19089180835).

782656412513 is a wasteful number, since it uses less digits than its factorization.

782656412513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19089180834.

The product of its digits is 2419200, while the sum is 50.

The spelling of 782656412513 in words is "seven hundred eighty-two billion, six hundred fifty-six million, four hundred twelve thousand, five hundred thirteen".