164581057 has 2 divisors, whose sum is σ = 164581058. Its totient is φ = 164581056.

The previous prime is 164581051. The next prime is 164581073. The reversal of 164581057 is 750185461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98386561 + 66194496 = 9919^2 + 8136^2 .

It is a cyclic number.

It is not a de Polignac number, because 164581057 - 2³ = 164581049 is a prime.

It is not a weakly prime, because it can be changed into another prime (164581051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82290528 + 82290529.

It is an arithmetic number, because the mean of its divisors is an integer number (82290529).

Almost surely, 2^164581057 is an apocalyptic number.

It is an amenable number.

164581057 is a deficient number, since it is larger than the sum of its proper divisors (1).

164581057 is an equidigital number, since it uses as much as digits as its factorization.

164581057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 164581057 is about 12828.9148800668. The cubic root of 164581057 is about 548.0160554818.

The spelling of 164581057 in words is "one hundred sixty-four million, five hundred eighty-one thousand, fifty-seven".