164926866437 has 2 divisors, whose sum is σ = 164926866438. Its totient is φ = 164926866436.

The previous prime is 164926866431. The next prime is 164926866463. The reversal of 164926866437 is 734668629461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147629619076 + 17297247361 = 384226^2 + 131519^2 .

It is a cyclic number.

It is not a de Polignac number, because 164926866437 - 2⁶ = 164926866373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164926866437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164926866431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82463433218 + 82463433219.

It is an arithmetic number, because the mean of its divisors is an integer number (82463433219).

Almost surely, 2^164926866437 is an apocalyptic number.

It is an amenable number.

164926866437 is a deficient number, since it is larger than the sum of its proper divisors (1).

164926866437 is an equidigital number, since it uses as much as digits as its factorization.

164926866437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 62.

The spelling of 164926866437 in words is "one hundred sixty-four billion, nine hundred twenty-six million, eight hundred sixty-six thousand, four hundred thirty-seven".