957399749774549 has 2 divisors, whose sum is σ = 957399749774550. Its totient is φ = 957399749774548.

The previous prime is 957399749774491. The next prime is 957399749774551. The reversal of 957399749774549 is 945477947993759.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 699034310712049 + 258365439062500 = 26439257^2 + 16073750^2 .

It is an emirp because it is prime and its reverse (945477947993759) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 957399749774549 - 2²⁴ = 957399732997333 is a prime.

It is a super-2 number, since 2×957399749774549² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 957399749774551, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (957399749774579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478699874887274 + 478699874887275.

It is an arithmetic number, because the mean of its divisors is an integer number (478699874887275).

Almost surely, 2^{957399749774549} is an apocalyptic number.

It is an amenable number.

957399749774549 is a deficient number, since it is larger than the sum of its proper divisors (1).

957399749774549 is an equidigital number, since it uses as much as digits as its factorization.

957399749774549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680527915200, while the sum is 98.

The spelling of 957399749774549 in words is "nine hundred fifty-seven trillion, three hundred ninety-nine billion, seven hundred forty-nine million, seven hundred seventy-four thousand, five hundred forty-nine".