813406440441 has 32 divisors (see below), whose sum is σ = 1313004522240. Its totient is φ = 437256400896.

The previous prime is 813406440401. The next prime is 813406440527. The reversal of 813406440441 is 144044604318.

It is not a de Polignac number, because 813406440441 - 2¹⁴ = 813406424057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 813406440441.

It is not an unprimeable number, because it can be changed into a prime (813406440401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224955 + ... + 1295151.

It is an arithmetic number, because the mean of its divisors is an integer number (41031391320).

Almost surely, 2^813406440441 is an apocalyptic number.

It is an amenable number.

813406440441 is a deficient number, since it is larger than the sum of its proper divisors (499598081799).

813406440441 is a wasteful number, since it uses less digits than its factorization.

813406440441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072353.

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 813406440441 in words is "eight hundred thirteen billion, four hundred six million, four hundred forty thousand, four hundred forty-one".