64800315637 has 2 divisors, whose sum is σ = 64800315638. Its totient is φ = 64800315636.

The previous prime is 64800315617. The next prime is 64800315649. The reversal of 64800315637 is 73651300846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32770412676 + 32029902961 = 181026^2 + 178969^2 .

It is a cyclic number.

It is not a de Polignac number, because 64800315637 - 2¹⁹ = 64799791349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64800315593 and 64800315602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64800315617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32400157818 + 32400157819.

It is an arithmetic number, because the mean of its divisors is an integer number (32400157819).

Almost surely, 2^64800315637 is an apocalyptic number.

It is an amenable number.

64800315637 is a deficient number, since it is larger than the sum of its proper divisors (1).

64800315637 is an equidigital number, since it uses as much as digits as its factorization.

64800315637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 64800315637 in words is "sixty-four billion, eight hundred million, three hundred fifteen thousand, six hundred thirty-seven".