6446226397 has 8 divisors (see below), whose sum is σ = 7166028800. Its totient is φ = 5758415280.

The previous prime is 6446226377. The next prime is 6446226407. The reversal of 6446226397 is 7936226446.

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 6446226397 - 2²⁷ = 6312008669 is a prime.

It is a super-2 number, since 2×6446226397² = 83107669522759203218, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6446226397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6446226337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7997397 + ... + 7998202.

It is an arithmetic number, because the mean of its divisors is an integer number (895753600).

Almost surely, 2^6446226397 is an apocalyptic number.

It is an amenable number.

6446226397 is a deficient number, since it is larger than the sum of its proper divisors (719802403).

6446226397 is a wasteful number, since it uses less digits than its factorization.

6446226397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15995643.

The product of its digits is 2612736, while the sum is 49.

The square root of 6446226397 is about 80288.3951577063. The cubic root of 6446226397 is about 1861.0948959802.

Adding to 6446226397 its sum of digits (49), we get a palindrome (6446226446).

The spelling of 6446226397 in words is "six billion, four hundred forty-six million, two hundred twenty-six thousand, three hundred ninety-seven".