651771131222443 has 16 divisors (see below), whose sum is σ = 695915248991040. Its totient is φ = 609045169368064.

The previous prime is 651771131222441. The next prime is 651771131222447. The reversal of 651771131222443 is 344222131177156.

It is a cyclic number.

It is not a de Polignac number, because 651771131222443 - 2¹ = 651771131222441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651771131222441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1147091278 + ... + 1147659331.

It is an arithmetic number, because the mean of its divisors is an integer number (43494703061940).

Almost surely, 2^{651771131222443} is an apocalyptic number.

651771131222443 is a deficient number, since it is larger than the sum of its proper divisors (44144117768597).

651771131222443 is a wasteful number, since it uses less digits than its factorization.

651771131222443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294750918.

The product of its digits is 1693440, while the sum is 49.

Adding to 651771131222443 its reverse (344222131177156), we get a palindrome (995993262399599).

The spelling of 651771131222443 in words is "six hundred fifty-one trillion, seven hundred seventy-one billion, one hundred thirty-one million, two hundred twenty-two thousand, four hundred forty-three".