36531420637 has 2 divisors, whose sum is σ = 36531420638. Its totient is φ = 36531420636.

The previous prime is 36531420617. The next prime is 36531420659. The reversal of 36531420637 is 73602413563.

36531420637 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32423764356 + 4107656281 = 180066^2 + 64091^2 .

It is a cyclic number.

It is not a de Polignac number, because 36531420637 - 2⁷ = 36531420509 is a prime.

It is a super-4 number, since 4×36531420637⁴ (a number of 43 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 36531420637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36531420617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18265710318 + 18265710319.

It is an arithmetic number, because the mean of its divisors is an integer number (18265710319).

Almost surely, 2^36531420637 is an apocalyptic number.

It is an amenable number.

36531420637 is a deficient number, since it is larger than the sum of its proper divisors (1).

36531420637 is an equidigital number, since it uses as much as digits as its factorization.

36531420637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 36531420637 in words is "thirty-six billion, five hundred thirty-one million, four hundred twenty thousand, six hundred thirty-seven".