7381393696681 has 4 divisors (see below), whose sum is σ = 7390772850832. Its totient is φ = 7372014542532.

The previous prime is 7381393696673. The next prime is 7381393696711. The reversal of 7381393696681 is 1866963931837.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7381393696681 - 2³ = 7381393696673 is a prime.

It is a super-2 number, since 2×7381393696681² (a number of 27 digits) contains 22 as substring.

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 7381393696681.

It is not an unprimeable number, because it can be changed into a prime (7381393696631) 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, 4689575895 + ... + 4689577468.

It is an arithmetic number, because the mean of its divisors is an integer number (1847693212708).

Almost surely, 2^{7381393696681} is an apocalyptic number.

It is an amenable number.

7381393696681 is a deficient number, since it is larger than the sum of its proper divisors (9379154151).

7381393696681 is an equidigital number, since it uses as much as digits as its factorization.

7381393696681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9379154150.

The product of its digits is 211631616, while the sum is 70.

The spelling of 7381393696681 in words is "seven trillion, three hundred eighty-one billion, three hundred ninety-three million, six hundred ninety-six thousand, six hundred eighty-one".