7126736399 has 16 divisors (see below), whose sum is σ = 7658763840. Its totient is φ = 6618528000.

The previous prime is 7126736359. The next prime is 7126736401. The reversal of 7126736399 is 9936376217.

It is a Cunningham number, because it is equal to 84420²-1.

It is a cyclic number.

It is not a de Polignac number, because 7126736399 - 2²⁰ = 7125687823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7126736399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7126736329) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 42209 + ... + 126629.

It is an arithmetic number, because the mean of its divisors is an integer number (478672740).

Almost surely, 2^7126736399 is an apocalyptic number.

7126736399 is a deficient number, since it is larger than the sum of its proper divisors (532027441).

7126736399 is a wasteful number, since it uses less digits than its factorization.

7126736399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84562.

The product of its digits is 2571912, while the sum is 53.

The square root of 7126736399 is about 84419.9999940772. Note that the first 5 decimals coincide. The cubic root of 7126736399 is about 1924.4068695152.

The spelling of 7126736399 in words is "seven billion, one hundred twenty-six million, seven hundred thirty-six thousand, three hundred ninety-nine".