6446941757 has 2 divisors, whose sum is σ = 6446941758. Its totient is φ = 6446941756.

The previous prime is 6446941747. The next prime is 6446941771. The reversal of 6446941757 is 7571496446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5494663876 + 952277881 = 74126^2 + 30859^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6446941757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6446941699 and 6446941708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6446941717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223470878 + 3223470879.

It is an arithmetic number, because the mean of its divisors is an integer number (3223470879).

Almost surely, 2^6446941757 is an apocalyptic number.

It is an amenable number.

6446941757 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446941757 is an equidigital number, since it uses as much as digits as its factorization.

6446941757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 53.

The square root of 6446941757 is about 80292.8499743283. The cubic root of 6446941757 is about 1861.1637374758.

The spelling of 6446941757 in words is "six billion, four hundred forty-six million, nine hundred forty-one thousand, seven hundred fifty-seven".