780828176813 has 8 divisors (see below), whose sum is σ = 784445611320. Its totient is φ = 777216037120.

The previous prime is 780828176783. The next prime is 780828176833. The reversal of 780828176813 is 318671828087.

It can be written as a sum of positive squares in 4 ways, for example, as 12745958404 + 768082218409 = 112898^2 + 876403^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 780828176813 - 2²⁴ = 780811399597 is a prime.

It is a super-2 number, since 2×780828176813² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780828176833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1027928 + ... + 1618113.

It is an arithmetic number, because the mean of its divisors is an integer number (98055701415).

Almost surely, 2^780828176813 is an apocalyptic number.

It is an amenable number.

780828176813 is a deficient number, since it is larger than the sum of its proper divisors (3617434507).

780828176813 is a wasteful number, since it uses less digits than its factorization.

780828176813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647407.

The product of its (nonzero) digits is 7225344, while the sum is 59.

The spelling of 780828176813 in words is "seven hundred eighty billion, eight hundred twenty-eight million, one hundred seventy-six thousand, eight hundred thirteen".