6168644087761 has 8 divisors (see below), whose sum is σ = 6171581359944. Its totient is φ = 6165707489280.

The previous prime is 6168644087731. The next prime is 6168644087777. The reversal of 6168644087761 is 1677804468616.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1134256950225 + 5034387137536 = 1065015^2 + 2243744^2 .

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 6168644087761 - 2¹⁹ = 6168643563473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6168644087693 and 6168644087702.

It is not an unprimeable number, because it can be changed into a prime (6168644087701) 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, 18645561 + ... + 18973513.

It is an arithmetic number, because the mean of its divisors is an integer number (771447669993).

Almost surely, 2^{6168644087761} is an apocalyptic number.

It is an amenable number.

6168644087761 is a deficient number, since it is larger than the sum of its proper divisors (2937272183).

6168644087761 is a wasteful number, since it uses less digits than its factorization.

6168644087761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336851.

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 6168644087761 in words is "six trillion, one hundred sixty-eight billion, six hundred forty-four million, eighty-seven thousand, seven hundred sixty-one".