3618355906817 has 2 divisors, whose sum is σ = 3618355906818. Its totient is φ = 3618355906816.

The previous prime is 3618355906793. The next prime is 3618355906843. The reversal of 3618355906817 is 7186095538163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3335503184896 + 282852721921 = 1826336^2 + 531839^2 .

It is a cyclic number.

It is not a de Polignac number, because 3618355906817 - 2¹⁶ = 3618355841281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3618355906817.

It is not a weakly prime, because it can be changed into another prime (3618355903817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1809177953408 + 1809177953409.

It is an arithmetic number, because the mean of its divisors is an integer number (1809177953409).

Almost surely, 2^{3618355906817} is an apocalyptic number.

It is an amenable number.

3618355906817 is a deficient number, since it is larger than the sum of its proper divisors (1).

3618355906817 is an equidigital number, since it uses as much as digits as its factorization.

3618355906817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 3618355906817 in words is "three trillion, six hundred eighteen billion, three hundred fifty-five million, nine hundred six thousand, eight hundred seventeen".