1617207601081 has 2 divisors, whose sum is σ = 1617207601082. Its totient is φ = 1617207601080.

The previous prime is 1617207601043. The next prime is 1617207601133. The reversal of 1617207601081 is 1801067027161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1617180195856 + 27405225 = 1271684^2 + 5235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1617207601081 is a prime.

It is a super-2 number, since 2×1617207601081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1617207601001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808603800540 + 808603800541.

It is an arithmetic number, because the mean of its divisors is an integer number (808603800541).

Almost surely, 2^{1617207601081} is an apocalyptic number.

It is an amenable number.

1617207601081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617207601081 is an equidigital number, since it uses as much as digits as its factorization.

1617207601081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 1617207601081 in words is "one trillion, six hundred seventeen billion, two hundred seven million, six hundred one thousand, eighty-one".