9657391391953 has 2 divisors, whose sum is σ = 9657391391954. Its totient is φ = 9657391391952.

The previous prime is 9657391391827. The next prime is 9657391391959. The reversal of 9657391391953 is 3591931937569.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7057273841809 + 2600117550144 = 2656553^2 + 1612488^2 .

It is a cyclic number.

It is not a de Polignac number, because 9657391391953 - 2⁹ = 9657391391441 is a prime.

It is not a weakly prime, because it can be changed into another prime (9657391391959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4828695695976 + 4828695695977.

It is an arithmetic number, because the mean of its divisors is an integer number (4828695695977).

Almost surely, 2^{9657391391953} is an apocalyptic number.

It is an amenable number.

9657391391953 is a deficient number, since it is larger than the sum of its proper divisors (1).

9657391391953 is an equidigital number, since it uses as much as digits as its factorization.

9657391391953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186004350, while the sum is 70.

The spelling of 9657391391953 in words is "nine trillion, six hundred fifty-seven billion, three hundred ninety-one million, three hundred ninety-one thousand, nine hundred fifty-three".