636370619497 has 2 divisors, whose sum is σ = 636370619498. Its totient is φ = 636370619496.

The previous prime is 636370619473. The next prime is 636370619509. The reversal of 636370619497 is 794916073636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540877877136 + 95492742361 = 735444^2 + 309019^2 .

It is a cyclic number.

It is not a de Polignac number, because 636370619497 - 2¹⁵ = 636370586729 is a prime.

It is not a weakly prime, because it can be changed into another prime (636370610497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318185309748 + 318185309749.

It is an arithmetic number, because the mean of its divisors is an integer number (318185309749).

Almost surely, 2^636370619497 is an apocalyptic number.

It is an amenable number.

636370619497 is a deficient number, since it is larger than the sum of its proper divisors (1).

636370619497 is an equidigital number, since it uses as much as digits as its factorization.

636370619497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30862944, while the sum is 61.

The spelling of 636370619497 in words is "six hundred thirty-six billion, three hundred seventy million, six hundred nineteen thousand, four hundred ninety-seven".