161220910090063 has 2 divisors, whose sum is σ = 161220910090064. Its totient is φ = 161220910090062.

The previous prime is 161220910090027. The next prime is 161220910090139. The reversal of 161220910090063 is 360090019022161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161220910090063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161220910089998 and 161220910090025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161220910094063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80610455045031 + 80610455045032.

It is an arithmetic number, because the mean of its divisors is an integer number (80610455045032).

Almost surely, 2^{161220910090063} is an apocalyptic number.

161220910090063 is a deficient number, since it is larger than the sum of its proper divisors (1).

161220910090063 is an equidigital number, since it uses as much as digits as its factorization.

161220910090063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 161220910090063 in words is "one hundred sixty-one trillion, two hundred twenty billion, nine hundred ten million, ninety thousand, sixty-three".