6940359613821 has 4 divisors (see below), whose sum is σ = 9253812818432. Its totient is φ = 4626906409212.

The previous prime is 6940359613813. The next prime is 6940359613823. The reversal of 6940359613821 is 1283169530496.

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 not a de Polignac number, because 6940359613821 - 2³ = 6940359613813 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 (6940359613823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156726602301 + ... + 1156726602306.

It is an arithmetic number, because the mean of its divisors is an integer number (2313453204608).

Almost surely, 2^{6940359613821} is an apocalyptic number.

It is an amenable number.

6940359613821 is a deficient number, since it is larger than the sum of its proper divisors (2313453204611).

6940359613821 is a wasteful number, since it uses less digits than its factorization.

6940359613821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313453204610.

The product of its (nonzero) digits is 8398080, while the sum is 57.

The spelling of 6940359613821 in words is "six trillion, nine hundred forty billion, three hundred fifty-nine million, six hundred thirteen thousand, eight hundred twenty-one".