813022917240 has 32 divisors (see below), whose sum is σ = 2439068752080. Its totient is φ = 216806111232.

The previous prime is 813022917233. The next prime is 813022917251. The reversal of 813022917240 is 42719220318.

It is a super-2 number, since 2×813022917240² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3387595369 + ... + 3387595608.

Almost surely, 2^813022917240 is an apocalyptic number.

It is an amenable number.

813022917240 is an abundant number, since it is smaller than the sum of its proper divisors (1626045834840).

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

813022917240 is a wasteful number, since it uses less digits than its factorization.

813022917240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775190991 (or 6775190987 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 813022917240 in words is "eight hundred thirteen billion, twenty-two million, nine hundred seventeen thousand, two hundred forty".