164394926503 has 2 divisors, whose sum is σ = 164394926504. Its totient is φ = 164394926502.

The previous prime is 164394926491. The next prime is 164394926593. The reversal of 164394926503 is 305629493461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164394926503 - 2²¹ = 164392829351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164394926593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82197463251 + 82197463252.

It is an arithmetic number, because the mean of its divisors is an integer number (82197463252).

Almost surely, 2^164394926503 is an apocalyptic number.

164394926503 is a deficient number, since it is larger than the sum of its proper divisors (1).

164394926503 is an equidigital number, since it uses as much as digits as its factorization.

164394926503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The spelling of 164394926503 in words is "one hundred sixty-four billion, three hundred ninety-four million, nine hundred twenty-six thousand, five hundred three".