6398227195581 has 32 divisors (see below), whose sum is σ = 9450171924480. Its totient is φ = 3825872869824.

The previous prime is 6398227195579. The next prime is 6398227195583. The reversal of 6398227195581 is 1855917228936.

It is an interprime number because it is at equal distance from previous prime (6398227195579) and next prime (6398227195583).

It is not a de Polignac number, because 6398227195581 - 2¹ = 6398227195579 is a prime.

It is a super-2 number, since 2×6398227195581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398227195583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12301245 + ... + 12810818.

It is an arithmetic number, because the mean of its divisors is an integer number (295317872640).

Almost surely, 2^{6398227195581} is an apocalyptic number.

It is an amenable number.

6398227195581 is a deficient number, since it is larger than the sum of its proper divisors (3051944728899).

6398227195581 is a wasteful number, since it uses less digits than its factorization.

6398227195581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25112265.

The product of its digits is 65318400, while the sum is 66.

The spelling of 6398227195581 in words is "six trillion, three hundred ninety-eight billion, two hundred twenty-seven million, one hundred ninety-five thousand, five hundred eighty-one".