165736457 has 2 divisors, whose sum is σ = 165736458. Its totient is φ = 165736456.

The previous prime is 165736453. The next prime is 165736463. The reversal of 165736457 is 754637561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106584976 + 59151481 = 10324^2 + 7691^2 .

It is a cyclic number.

It is not a de Polignac number, because 165736457 - 2² = 165736453 is a prime.

It is not a weakly prime, because it can be changed into another prime (165736453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82868228 + 82868229.

It is an arithmetic number, because the mean of its divisors is an integer number (82868229).

Almost surely, 2^165736457 is an apocalyptic number.

It is an amenable number.

165736457 is a deficient number, since it is larger than the sum of its proper divisors (1).

165736457 is an equidigital number, since it uses as much as digits as its factorization.

165736457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 44.

The square root of 165736457 is about 12873.8672123026. The cubic root of 165736457 is about 549.2954692560.

The spelling of 165736457 in words is "one hundred sixty-five million, seven hundred thirty-six thousand, four hundred fifty-seven".