164372858477 has 2 divisors, whose sum is σ = 164372858478. Its totient is φ = 164372858476.

The previous prime is 164372858471. The next prime is 164372858513. The reversal of 164372858477 is 774858273461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162392074441 + 1980784036 = 402979^2 + 44506^2 .

It is a cyclic number.

It is not a de Polignac number, because 164372858477 - 2⁶ = 164372858413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164372858471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82186429238 + 82186429239.

It is an arithmetic number, because the mean of its divisors is an integer number (82186429239).

Almost surely, 2^164372858477 is an apocalyptic number.

It is an amenable number.

164372858477 is a deficient number, since it is larger than the sum of its proper divisors (1).

164372858477 is an equidigital number, since it uses as much as digits as its factorization.

164372858477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63221760, while the sum is 62.

The spelling of 164372858477 in words is "one hundred sixty-four billion, three hundred seventy-two million, eight hundred fifty-eight thousand, four hundred seventy-seven".