6994638511 has 8 divisors (see below), whose sum is σ = 8414602880. Its totient is φ = 5679856728.

The previous prime is 6994638509. The next prime is 6994638529. The reversal of 6994638511 is 1158364996.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6994638511 - 2¹ = 6994638509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6994638011) 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 7 ways as a sum of consecutive naturals, for example, 26295501 + ... + 26295766.

It is an arithmetic number, because the mean of its divisors is an integer number (1051825360).

Almost surely, 2^6994638511 is an apocalyptic number.

6994638511 is a deficient number, since it is larger than the sum of its proper divisors (1419964369).

6994638511 is a wasteful number, since it uses less digits than its factorization.

6994638511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52591293.

The product of its digits is 1399680, while the sum is 52.

The square root of 6994638511 is about 83633.9554905781. The cubic root of 6994638511 is about 1912.4426694820.

The spelling of 6994638511 in words is "six billion, nine hundred ninety-four million, six hundred thirty-eight thousand, five hundred eleven".