6445693801 has 2 divisors, whose sum is σ = 6445693802. Its totient is φ = 6445693800.

The previous prime is 6445693789. The next prime is 6445693831. The reversal of 6445693801 is 1083965446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4108938201 + 2336755600 = 64101^2 + 48340^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445693801 - 2¹¹ = 6445691753 is a prime.

It is not a weakly prime, because it can be changed into another prime (6445693831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222846900 + 3222846901.

It is an arithmetic number, because the mean of its divisors is an integer number (3222846901).

Almost surely, 2^6445693801 is an apocalyptic number.

It is an amenable number.

6445693801 is a deficient number, since it is larger than the sum of its proper divisors (1).

6445693801 is an equidigital number, since it uses as much as digits as its factorization.

6445693801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 6445693801 is about 80285.0783209433. The cubic root of 6445693801 is about 1861.0436391706.

The spelling of 6445693801 in words is "six billion, four hundred forty-five million, six hundred ninety-three thousand, eight hundred one".