3600221618381 has 2 divisors, whose sum is σ = 3600221618382. Its totient is φ = 3600221618380.

The previous prime is 3600221618359. The next prime is 3600221618387. The reversal of 3600221618381 is 1838161220063.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3076673862025 + 523547756356 = 1754045^2 + 723566^2 .

It is a cyclic number.

It is not a de Polignac number, because 3600221618381 - 2³⁰ = 3599147876557 is a prime.

It is a super-2 number, since 2×3600221618381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3600221618387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1800110809190 + 1800110809191.

It is an arithmetic number, because the mean of its divisors is an integer number (1800110809191).

Almost surely, 2^{3600221618381} is an apocalyptic number.

It is an amenable number.

3600221618381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3600221618381 is an equidigital number, since it uses as much as digits as its factorization.

3600221618381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 3600221618381 in words is "three trillion, six hundred billion, two hundred twenty-one million, six hundred eighteen thousand, three hundred eighty-one".