90761680169 has 2 divisors, whose sum is σ = 90761680170. Its totient is φ = 90761680168.

The previous prime is 90761680091. The next prime is 90761680193. The reversal of 90761680169 is 96108616709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69966598144 + 20795082025 = 264512^2 + 144205^2 .

It is a cyclic number.

It is not a de Polignac number, because 90761680169 - 2¹² = 90761676073 is a prime.

It is a super-2 number, since 2×90761680169² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90761680169.

It is not a weakly prime, because it can be changed into another prime (90761680369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45380840084 + 45380840085.

It is an arithmetic number, because the mean of its divisors is an integer number (45380840085).

Almost surely, 2^90761680169 is an apocalyptic number.

It is an amenable number.

90761680169 is a deficient number, since it is larger than the sum of its proper divisors (1).

90761680169 is an equidigital number, since it uses as much as digits as its factorization.

90761680169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 90761680169 in words is "ninety billion, seven hundred sixty-one million, six hundred eighty thousand, one hundred sixty-nine".