36638521607 has 2 divisors, whose sum is σ = 36638521608. Its totient is φ = 36638521606.

The previous prime is 36638521559. The next prime is 36638521631. The reversal of 36638521607 is 70612583663.

36638521607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36638521607 - 2²⁴ = 36621744391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36638521697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18319260803 + 18319260804.

It is an arithmetic number, because the mean of its divisors is an integer number (18319260804).

Almost surely, 2^36638521607 is an apocalyptic number.

36638521607 is a deficient number, since it is larger than the sum of its proper divisors (1).

36638521607 is an equidigital number, since it uses as much as digits as its factorization.

36638521607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 36638521607 in words is "thirty-six billion, six hundred thirty-eight million, five hundred twenty-one thousand, six hundred seven".