6393914069661 has 24 divisors (see below), whose sum is σ = 9783185198904. Its totient is φ = 4010120862720.

The previous prime is 6393914069623. The next prime is 6393914069789. The reversal of 6393914069661 is 1669604193936.

6393914069661 is a `hidden beast` number, since 6 + 393 + 91 + 40 + 69 + 6 + 61 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 440655664761 + 5953258404900 = 663819^2 + 2439930^2 .

It is not a de Polignac number, because 6393914069661 - 2⁷ = 6393914069533 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6393914062661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8745270 + ... + 9448151.

It is an arithmetic number, because the mean of its divisors is an integer number (407632716621).

Almost surely, 2^{6393914069661} is an apocalyptic number.

It is an amenable number.

6393914069661 is a deficient number, since it is larger than the sum of its proper divisors (3389271129243).

6393914069661 is a wasteful number, since it uses less digits than its factorization.

6393914069661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18195741 (or 18195738 counting only the distinct ones).

The product of its (nonzero) digits is 34012224, while the sum is 63.

The spelling of 6393914069661 in words is "six trillion, three hundred ninety-three billion, nine hundred fourteen million, sixty-nine thousand, six hundred sixty-one".