813556413 has 16 divisors (see below), whose sum is σ = 1228011840. Its totient is φ = 532136592.

The previous prime is 813556397. The next prime is 813556433. The reversal of 813556413 is 314655318.

813556413 is a `hidden beast` number, since 8 + 1 + 3 + 5 + 5 + 641 + 3 = 666.

It is not a de Polignac number, because 813556413 - 2⁴ = 813556397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813556433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282831 + ... + 285692.

It is an arithmetic number, because the mean of its divisors is an integer number (76750740).

Almost surely, 2^813556413 is an apocalyptic number.

It is an amenable number.

813556413 is a deficient number, since it is larger than the sum of its proper divisors (414455427).

813556413 is a wasteful number, since it uses less digits than its factorization.

813556413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568585 (or 568579 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 813556413 is about 28522.9103178480. The cubic root of 813556413 is about 933.5320318313.

The spelling of 813556413 in words is "eight hundred thirteen million, five hundred fifty-six thousand, four hundred thirteen".