164222045857 has 2 divisors, whose sum is σ = 164222045858. Its totient is φ = 164222045856.

The previous prime is 164222045777. The next prime is 164222045879. The reversal of 164222045857 is 758540222461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153044481681 + 11177564176 = 391209^2 + 105724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164222045857 is a prime.

It is a super-2 number, since 2×164222045857² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164222045557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82111022928 + 82111022929.

It is an arithmetic number, because the mean of its divisors is an integer number (82111022929).

Almost surely, 2^164222045857 is an apocalyptic number.

It is an amenable number.

164222045857 is a deficient number, since it is larger than the sum of its proper divisors (1).

164222045857 is an equidigital number, since it uses as much as digits as its factorization.

164222045857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1075200, while the sum is 46.

The spelling of 164222045857 in words is "one hundred sixty-four billion, two hundred twenty-two million, forty-five thousand, eight hundred fifty-seven".