164388891607 has 2 divisors, whose sum is σ = 164388891608. Its totient is φ = 164388891606.

The previous prime is 164388891593. The next prime is 164388891619. The reversal of 164388891607 is 706198883461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164388891607 - 2¹¹ = 164388889559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164388891637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82194445803 + 82194445804.

It is an arithmetic number, because the mean of its divisors is an integer number (82194445804).

Almost surely, 2^164388891607 is an apocalyptic number.

164388891607 is a deficient number, since it is larger than the sum of its proper divisors (1).

164388891607 is an equidigital number, since it uses as much as digits as its factorization.

164388891607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 164388891607 in words is "one hundred sixty-four billion, three hundred eighty-eight million, eight hundred ninety-one thousand, six hundred seven".