1655206522201 has 2 divisors, whose sum is σ = 1655206522202. Its totient is φ = 1655206522200.

The previous prime is 1655206522199. The next prime is 1655206522247. The reversal of 1655206522201 is 1022256025561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1367133870025 + 288072652176 = 1169245^2 + 536724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655206522201 - 2¹ = 1655206522199 is a prime.

It is a super-2 number, since 2×1655206522201² (a number of 25 digits) contains 22 as substring.

Together with 1655206522199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1655206522261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827603261100 + 827603261101.

It is an arithmetic number, because the mean of its divisors is an integer number (827603261101).

Almost surely, 2^{1655206522201} is an apocalyptic number.

It is an amenable number.

1655206522201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655206522201 is an equidigital number, since it uses as much as digits as its factorization.

1655206522201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 37.

The spelling of 1655206522201 in words is "one trillion, six hundred fifty-five billion, two hundred six million, five hundred twenty-two thousand, two hundred one".