3616680531637 has 2 divisors, whose sum is σ = 3616680531638. Its totient is φ = 3616680531636.

The previous prime is 3616680531619. The next prime is 3616680531703. The reversal of 3616680531637 is 7361350866163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2611582049521 + 1005098482116 = 1616039^2 + 1002546^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3616680531637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3616680538637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808340265818 + 1808340265819.

It is an arithmetic number, because the mean of its divisors is an integer number (1808340265819).

Almost surely, 2^{3616680531637} is an apocalyptic number.

It is an amenable number.

3616680531637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3616680531637 is an equidigital number, since it uses as much as digits as its factorization.

3616680531637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 3616680531637 in words is "three trillion, six hundred sixteen billion, six hundred eighty million, five hundred thirty-one thousand, six hundred thirty-seven".