651042455641 has 2 divisors, whose sum is σ = 651042455642. Its totient is φ = 651042455640.

The previous prime is 651042455611. The next prime is 651042455699. The reversal of 651042455641 is 146554240156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434836055241 + 216206400400 = 659421^2 + 464980^2 .

It is a cyclic number.

It is not a de Polignac number, because 651042455641 - 2¹⁵ = 651042422873 is a prime.

It is not a weakly prime, because it can be changed into another prime (651042455611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325521227820 + 325521227821.

It is an arithmetic number, because the mean of its divisors is an integer number (325521227821).

Almost surely, 2^651042455641 is an apocalyptic number.

It is an amenable number.

651042455641 is a deficient number, since it is larger than the sum of its proper divisors (1).

651042455641 is an equidigital number, since it uses as much as digits as its factorization.

651042455641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576000, while the sum is 43.

Adding to 651042455641 its reverse (146554240156), we get a palindrome (797596695797).

The spelling of 651042455641 in words is "six hundred fifty-one billion, forty-two million, four hundred fifty-five thousand, six hundred forty-one".