813557096677 has 8 divisors (see below), whose sum is σ = 878089728600. Its totient is φ = 749303224320.

The previous prime is 813557096629. The next prime is 813557096689. The reversal of 813557096677 is 776690755318.

813557096677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 901974²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 120349323396 + 693207773281 = 346914^2 + 832591^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813557096677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813557096377) 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, 69683824 + ... + 69695497.

It is an arithmetic number, because the mean of its divisors is an integer number (109761216075).

Almost surely, 2^813557096677 is an apocalyptic number.

It is an amenable number.

813557096677 is a deficient number, since it is larger than the sum of its proper divisors (64532631923).

813557096677 is a wasteful number, since it uses less digits than its factorization.

813557096677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139379783.

The product of its (nonzero) digits is 66679200, while the sum is 64.

The spelling of 813557096677 in words is "eight hundred thirteen billion, five hundred fifty-seven million, ninety-six thousand, six hundred seventy-seven".