7729647994 has 16 divisors (see below), whose sum is σ = 12009592800. Its totient is φ = 3726790704.

The previous prime is 7729647983. The next prime is 7729648061. The reversal of 7729647994 is 4997469277.

It is a super-2 number, since 2×7729647994² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39024 + ... + 130315.

It is an arithmetic number, because the mean of its divisors is an integer number (750599550).

Almost surely, 2^7729647994 is an apocalyptic number.

7729647994 is a deficient number, since it is larger than the sum of its proper divisors (4279944806).

7729647994 is a wasteful number, since it uses less digits than its factorization.

7729647994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170157.

The product of its digits is 48009024, while the sum is 64.

The square root of 7729647994 is about 87918.4166941148. The cubic root of 7729647994 is about 1977.2120059672.

The spelling of 7729647994 in words is "seven billion, seven hundred twenty-nine million, six hundred forty-seven thousand, nine hundred ninety-four".