165894243707 has 2 divisors, whose sum is σ = 165894243708. Its totient is φ = 165894243706.

The previous prime is 165894243689. The next prime is 165894243769. The reversal of 165894243707 is 707342498561.

It is a weak prime.

It is an emirp because it is prime and its reverse (707342498561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165894243707 - 2⁸ = 165894243451 is a prime.

It is not a weakly prime, because it can be changed into another prime (165894249707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82947121853 + 82947121854.

It is an arithmetic number, because the mean of its divisors is an integer number (82947121854).

It is a 1-persistent number, because it is pandigital, but 2⋅165894243707 = 331788487414 is not.

Almost surely, 2^165894243707 is an apocalyptic number.

165894243707 is a deficient number, since it is larger than the sum of its proper divisors (1).

165894243707 is an equidigital number, since it uses as much as digits as its factorization.

165894243707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 165894243707 in words is "one hundred sixty-five billion, eight hundred ninety-four million, two hundred forty-three thousand, seven hundred seven".