813365243400 has 48 divisors (see below), whose sum is σ = 2521432256400. Its totient is φ = 216897398080.

The previous prime is 813365243363. The next prime is 813365243401. The reversal of 813365243400 is 4342563318.

It is a super-2 number, since 2×813365243400² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (813365243401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 677803770 + ... + 677804969.

It is an arithmetic number, because the mean of its divisors is an integer number (52529838675).

Almost surely, 2^813365243400 is an apocalyptic number.

It is an amenable number.

813365243400 is an abundant number, since it is smaller than the sum of its proper divisors (1708067013000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813365243400 is a wasteful number, since it uses less digits than its factorization.

813365243400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355608758 (or 1355608749 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 813365243400 in words is "eight hundred thirteen billion, three hundred sixty-five million, two hundred forty-three thousand, four hundred".