813187240835 has 48 divisors (see below), whose sum is σ = 1035835392384. Its totient is φ = 612759112704.

The previous prime is 813187240777. The next prime is 813187240841. The reversal of 813187240835 is 538042781318.

It is not a de Polignac number, because 813187240835 - 2¹⁰ = 813187239811 is a prime.

It is a super-2 number, since 2×813187240835² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 463882319 + ... + 463884071.

It is an arithmetic number, because the mean of its divisors is an integer number (21579904008).

Almost surely, 2^813187240835 is an apocalyptic number.

813187240835 is a deficient number, since it is larger than the sum of its proper divisors (222648151549).

813187240835 is a wasteful number, since it uses less digits than its factorization.

813187240835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132 (or 3113 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 813187240835 in words is "eight hundred thirteen billion, one hundred eighty-seven million, two hundred forty thousand, eight hundred thirty-five".