7863126993 has 12 divisors (see below), whose sum is σ = 11359642320. Its totient is φ = 5241257496.

The previous prime is 7863126979. The next prime is 7863127033. The reversal of 7863126993 is 3996213687.

It is not a de Polignac number, because 7863126993 - 2¹⁰ = 7863125969 is a prime.

It is a super-2 number, since 2×7863126993² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7863126793) 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 11 ways as a sum of consecutive naturals, for example, 5671 + ... + 125532.

It is an arithmetic number, because the mean of its divisors is an integer number (946636860).

Almost surely, 2^7863126993 is an apocalyptic number.

It is an amenable number.

7863126993 is a deficient number, since it is larger than the sum of its proper divisors (3496515327).

7863126993 is a wasteful number, since it uses less digits than its factorization.

7863126993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137868 (or 137865 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 7863126993 is about 88674.2746967800. The cubic root of 7863126993 is about 1988.5282412673.

The spelling of 7863126993 in words is "seven billion, eight hundred sixty-three million, one hundred twenty-six thousand, nine hundred ninety-three".