6815147894 has 16 divisors (see below), whose sum is σ = 10705717728. Its totient is φ = 3247645632.

The previous prime is 6815147881. The next prime is 6815147903. The reversal of 6815147894 is 4987415186.

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, 254687 + ... + 280170.

It is an arithmetic number, because the mean of its divisors is an integer number (669107358).

Almost surely, 2^6815147894 is an apocalyptic number.

6815147894 is a deficient number, since it is larger than the sum of its proper divisors (3890569834).

6815147894 is a wasteful number, since it uses less digits than its factorization.

6815147894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535159.

The product of its digits is 1935360, while the sum is 53.

The square root of 6815147894 is about 82553.9090170780. The cubic root of 6815147894 is about 1895.9422074271.

The spelling of 6815147894 in words is "six billion, eight hundred fifteen million, one hundred forty-seven thousand, eight hundred ninety-four".