6815607139 has 16 divisors (see below), whose sum is σ = 7890600960. Its totient is φ = 5818181760.

The previous prime is 6815607107. The next prime is 6815607143. The reversal of 6815607139 is 9317065186.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6815607139 - 2⁵ = 6815607107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6815607179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40582 + ... + 123604.

It is an arithmetic number, because the mean of its divisors is an integer number (493162560).

Almost surely, 2^6815607139 is an apocalyptic number.

6815607139 is a deficient number, since it is larger than the sum of its proper divisors (1074993821).

6815607139 is a wasteful number, since it uses less digits than its factorization.

6815607139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83490.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 6815607139 is about 82556.6904557105. The cubic root of 6815607139 is about 1895.9847930728.

The spelling of 6815607139 in words is "six billion, eight hundred fifteen million, six hundred seven thousand, one hundred thirty-nine".