637679840041 has 2 divisors, whose sum is σ = 637679840042. Its totient is φ = 637679840040.

The previous prime is 637679839961. The next prime is 637679840159. The reversal of 637679840041 is 140048976736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 607614014016 + 30065826025 = 779496^2 + 173395^2 .

It is a cyclic number.

It is not a de Polignac number, because 637679840041 - 2¹⁵ = 637679807273 is a prime.

It is not a weakly prime, because it can be changed into another prime (637679840341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318839920020 + 318839920021.

It is an arithmetic number, because the mean of its divisors is an integer number (318839920021).

Almost surely, 2^637679840041 is an apocalyptic number.

It is an amenable number.

637679840041 is a deficient number, since it is larger than the sum of its proper divisors (1).

637679840041 is an equidigital number, since it uses as much as digits as its factorization.

637679840041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 637679840041 in words is "six hundred thirty-seven billion, six hundred seventy-nine million, eight hundred forty thousand, forty-one".