813870887841 has 24 divisors (see below), whose sum is σ = 1282529233440. Its totient is φ = 493229692800.

The previous prime is 813870887803. The next prime is 813870887857. The reversal of 813870887841 is 148788078318.

It is not a de Polignac number, because 813870887841 - 2¹⁸ = 813870625697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813870887881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1819305 + ... + 2222073.

It is an arithmetic number, because the mean of its divisors is an integer number (53438718060).

Almost surely, 2^813870887841 is an apocalyptic number.

It is an amenable number.

813870887841 is a deficient number, since it is larger than the sum of its proper divisors (468658345599).

813870887841 is a wasteful number, since it uses less digits than its factorization.

813870887841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423197 (or 423194 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 63.

The spelling of 813870887841 in words is "eight hundred thirteen billion, eight hundred seventy million, eight hundred eighty-seven thousand, eight hundred forty-one".