6371811493 has 2 divisors, whose sum is σ = 6371811494. Its totient is φ = 6371811492.

The previous prime is 6371811401. The next prime is 6371811541. The reversal of 6371811493 is 3941181736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4132818369 + 2238993124 = 64287^2 + 47318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6371811493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6371817493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3185905746 + 3185905747.

It is an arithmetic number, because the mean of its divisors is an integer number (3185905747).

Almost surely, 2^6371811493 is an apocalyptic number.

It is an amenable number.

6371811493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6371811493 is an equidigital number, since it uses as much as digits as its factorization.

6371811493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 6371811493 is about 79823.6274106859. The cubic root of 6371811493 is about 1853.9056996351.

The spelling of 6371811493 in words is "six billion, three hundred seventy-one million, eight hundred eleven thousand, four hundred ninety-three".