165730807157 has 2 divisors, whose sum is σ = 165730807158. Its totient is φ = 165730807156.

The previous prime is 165730807147. The next prime is 165730807183. The reversal of 165730807157 is 751708037561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162319546321 + 3411260836 = 402889^2 + 58406^2 .

It is a cyclic number.

It is not a de Polignac number, because 165730807157 - 2¹² = 165730803061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165730807127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82865403578 + 82865403579.

It is an arithmetic number, because the mean of its divisors is an integer number (82865403579).

Almost surely, 2^165730807157 is an apocalyptic number.

It is an amenable number.

165730807157 is a deficient number, since it is larger than the sum of its proper divisors (1).

165730807157 is an equidigital number, since it uses as much as digits as its factorization.

165730807157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1234800, while the sum is 50.

The spelling of 165730807157 in words is "one hundred sixty-five billion, seven hundred thirty million, eight hundred seven thousand, one hundred fifty-seven".