6815787492 has 48 divisors (see below), whose sum is σ = 17156748672. Its totient is φ = 2097937920.

The previous prime is 6815787491. The next prime is 6815787523. The reversal of 6815787492 is 2947875186.

It is a super-2 number, since 2×6815787492² = 92909918272207300128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6815787491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304384 + ... + 326007.

It is an arithmetic number, because the mean of its divisors is an integer number (357432264).

Almost surely, 2^6815787492 is an apocalyptic number.

It is an amenable number.

6815787492 is an abundant number, since it is smaller than the sum of its proper divisors (10340961180).

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

6815787492 is a wasteful number, since it uses less digits than its factorization.

6815787492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630468 (or 630466 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The square root of 6815787492 is about 82557.7827463892. The cubic root of 6815787492 is about 1896.0015166272.

The spelling of 6815787492 in words is "six billion, eight hundred fifteen million, seven hundred eighty-seven thousand, four hundred ninety-two".