161690496002603 has 2 divisors, whose sum is σ = 161690496002604. Its totient is φ = 161690496002602.

The previous prime is 161690496002491. The next prime is 161690496002617. The reversal of 161690496002603 is 306200694096161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161690496002603 - 2¹⁶ = 161690495937067 is a prime.

It is a super-2 number, since 2×161690496002603² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161690496002663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80845248001301 + 80845248001302.

It is an arithmetic number, because the mean of its divisors is an integer number (80845248001302).

Almost surely, 2^{161690496002603} is an apocalyptic number.

161690496002603 is a deficient number, since it is larger than the sum of its proper divisors (1).

161690496002603 is an equidigital number, since it uses as much as digits as its factorization.

161690496002603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The spelling of 161690496002603 in words is "one hundred sixty-one trillion, six hundred ninety billion, four hundred ninety-six million, two thousand, six hundred three".