164451457 has 2 divisors, whose sum is σ = 164451458. Its totient is φ = 164451456.

The previous prime is 164451409. The next prime is 164451481. The reversal of 164451457 is 754154461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164249856 + 201601 = 12816^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 164451457 - 2²³ = 156062849 is a prime.

It is not a weakly prime, because it can be changed into another prime (164455457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82225728 + 82225729.

It is an arithmetic number, because the mean of its divisors is an integer number (82225729).

Almost surely, 2^164451457 is an apocalyptic number.

It is an amenable number.

164451457 is a deficient number, since it is larger than the sum of its proper divisors (1).

164451457 is an equidigital number, since it uses as much as digits as its factorization.

164451457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 37.

The square root of 164451457 is about 12823.8627955854. The cubic root of 164451457 is about 547.8721719092.

The spelling of 164451457 in words is "one hundred sixty-four million, four hundred fifty-one thousand, four hundred fifty-seven".