165734689157 has 2 divisors, whose sum is σ = 165734689158. Its totient is φ = 165734689156.

The previous prime is 165734689147. The next prime is 165734689193. The reversal of 165734689157 is 751986437561.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163564433761 + 2170255396 = 404431^2 + 46586^2 .

It is a cyclic number.

It is not a de Polignac number, because 165734689157 - 2⁸ = 165734688901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165734689157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165734689147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82867344578 + 82867344579.

It is an arithmetic number, because the mean of its divisors is an integer number (82867344579).

Almost surely, 2^165734689157 is an apocalyptic number.

It is an amenable number.

165734689157 is a deficient number, since it is larger than the sum of its proper divisors (1).

165734689157 is an equidigital number, since it uses as much as digits as its factorization.

165734689157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 62.

The spelling of 165734689157 in words is "one hundred sixty-five billion, seven hundred thirty-four million, six hundred eighty-nine thousand, one hundred fifty-seven".