9621167774857 has 2 divisors, whose sum is σ = 9621167774858. Its totient is φ = 9621167774856.

The previous prime is 9621167774737. The next prime is 9621167774921. The reversal of 9621167774857 is 7584777611269.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9458890931961 + 162276842896 = 3075531^2 + 402836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9621167774857 is a prime.

It is not a weakly prime, because it can be changed into another prime (9621167474857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4810583887428 + 4810583887429.

It is an arithmetic number, because the mean of its divisors is an integer number (4810583887429).

Almost surely, 2^{9621167774857} is an apocalyptic number.

It is an amenable number.

9621167774857 is a deficient number, since it is larger than the sum of its proper divisors (1).

9621167774857 is an equidigital number, since it uses as much as digits as its factorization.

9621167774857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248935680, while the sum is 70.

The spelling of 9621167774857 in words is "nine trillion, six hundred twenty-one billion, one hundred sixty-seven million, seven hundred seventy-four thousand, eight hundred fifty-seven".