6400224893 has 2 divisors, whose sum is σ = 6400224894. Its totient is φ = 6400224892.

The previous prime is 6400224823. The next prime is 6400224899. The reversal of 6400224893 is 3984220046.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4993824889 + 1406400004 = 70667^2 + 37502^2 .

It is a cyclic number.

It is not a de Polignac number, because 6400224893 - 2⁸ = 6400224637 is a prime.

It is a super-2 number, since 2×6400224893² = 81925757361953722898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6400224899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3200112446 + 3200112447.

It is an arithmetic number, because the mean of its divisors is an integer number (3200112447).

Almost surely, 2^6400224893 is an apocalyptic number.

It is an amenable number.

6400224893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6400224893 is an equidigital number, since it uses as much as digits as its factorization.

6400224893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 6400224893 is about 80001.4055689024. The cubic root of 6400224893 is about 1856.6572802912.

The spelling of 6400224893 in words is "six billion, four hundred million, two hundred twenty-four thousand, eight hundred ninety-three".