164500493477 has 2 divisors, whose sum is σ = 164500493478. Its totient is φ = 164500493476.

The previous prime is 164500493449. The next prime is 164500493483. The reversal of 164500493477 is 774394005461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164471613601 + 28879876 = 405551^2 + 5374^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164500493477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164500493777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82250246738 + 82250246739.

It is an arithmetic number, because the mean of its divisors is an integer number (82250246739).

Almost surely, 2^164500493477 is an apocalyptic number.

It is an amenable number.

164500493477 is a deficient number, since it is larger than the sum of its proper divisors (1).

164500493477 is an equidigital number, since it uses as much as digits as its factorization.

164500493477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 164500493477 in words is "one hundred sixty-four billion, five hundred million, four hundred ninety-three thousand, four hundred seventy-seven".