7926985667693 has 4 divisors (see below), whose sum is σ = 7927281731580. Its totient is φ = 7926689603808.

The previous prime is 7926985667669. The next prime is 7926985667723. The reversal of 7926985667693 is 3967665896297.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2113688545609 + 5813297122084 = 1453853^2 + 2411078^2 .

It is a cyclic number.

It is not a de Polignac number, because 7926985667693 - 2⁸ = 7926985667437 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 (7926985667593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147991778 + ... + 148045331.

It is an arithmetic number, because the mean of its divisors is an integer number (1981820432895).

Almost surely, 2^{7926985667693} is an apocalyptic number.

It is an amenable number.

7926985667693 is a deficient number, since it is larger than the sum of its proper divisors (296063887).

7926985667693 is a wasteful number, since it uses less digits than its factorization.

7926985667693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296063886.

The product of its digits is 11110659840, while the sum is 83.

The spelling of 7926985667693 in words is "seven trillion, nine hundred twenty-six billion, nine hundred eighty-five million, six hundred sixty-seven thousand, six hundred ninety-three".