7826985667693 has 8 divisors (see below), whose sum is σ = 8287462564920. Its totient is φ = 7366516101120.

The previous prime is 7826985667687. The next prime is 7826985667741. The reversal of 7826985667693 is 3967665896287.

It can be written as a sum of positive squares in 4 ways, for example, as 3950820102889 + 3876165564804 = 1987667^2 + 1968798^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7826985667693 - 2¹⁷ = 7826985536621 is a prime.

It is a super-2 number, since 2×7826985667693² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7826985662693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446563 + ... + 3981631.

It is an arithmetic number, because the mean of its divisors is an integer number (1035932820615).

Almost surely, 2^{7826985667693} is an apocalyptic number.

It is an amenable number.

7826985667693 is a deficient number, since it is larger than the sum of its proper divisors (460476897227).

7826985667693 is a wasteful number, since it uses less digits than its factorization.

7826985667693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665327.

The product of its digits is 9876142080, while the sum is 82.

The spelling of 7826985667693 in words is "seven trillion, eight hundred twenty-six billion, nine hundred eighty-five million, six hundred sixty-seven thousand, six hundred ninety-three".