3661556055103 has 2 divisors, whose sum is σ = 3661556055104. Its totient is φ = 3661556055102.

The previous prime is 3661556055061. The next prime is 3661556055173. The reversal of 3661556055103 is 3015506551663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3661556055103 - 2⁴¹ = 1462532799551 is a prime.

It is a super-2 number, since 2×3661556055103² (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 (3661556055173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830778027551 + 1830778027552.

It is an arithmetic number, because the mean of its divisors is an integer number (1830778027552).

Almost surely, 2^{3661556055103} is an apocalyptic number.

3661556055103 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661556055103 is an equidigital number, since it uses as much as digits as its factorization.

3661556055103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215000, while the sum is 46.

The spelling of 3661556055103 in words is "three trillion, six hundred sixty-one billion, five hundred fifty-six million, fifty-five thousand, one hundred three".