5091145961897 has 2 divisors, whose sum is σ = 5091145961898. Its totient is φ = 5091145961896.

The previous prime is 5091145961851. The next prime is 5091145961899. The reversal of 5091145961897 is 7981695411905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4951052209216 + 140093752681 = 2225096^2 + 374291^2 .

It is a cyclic number.

It is not a de Polignac number, because 5091145961897 - 2³⁶ = 5022426485161 is a prime.

It is a super-3 number, since 3×5091145961897³ (a number of 39 digits) contains 333 as substring.

Together with 5091145961899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5091145961899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2545572980948 + 2545572980949.

It is an arithmetic number, because the mean of its divisors is an integer number (2545572980949).

Almost surely, 2^{5091145961897} is an apocalyptic number.

It is an amenable number.

5091145961897 is a deficient number, since it is larger than the sum of its proper divisors (1).

5091145961897 is an equidigital number, since it uses as much as digits as its factorization.

5091145961897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24494400, while the sum is 65.

The spelling of 5091145961897 in words is "five trillion, ninety-one billion, one hundred forty-five million, nine hundred sixty-one thousand, eight hundred ninety-seven".