165551156144519 has 2 divisors, whose sum is σ = 165551156144520. Its totient is φ = 165551156144518.

The previous prime is 165551156144477. The next prime is 165551156144533. The reversal of 165551156144519 is 915441651155561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165551156144519 - 2²⁰ = 165551155095943 is a prime.

It is a super-2 number, since 2×165551156144519² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165551156144219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82775578072259 + 82775578072260.

It is an arithmetic number, because the mean of its divisors is an integer number (82775578072260).

Almost surely, 2^{165551156144519} is an apocalyptic number.

165551156144519 is a deficient number, since it is larger than the sum of its proper divisors (1).

165551156144519 is an equidigital number, since it uses as much as digits as its factorization.

165551156144519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200000, while the sum is 59.

The spelling of 165551156144519 in words is "one hundred sixty-five trillion, five hundred fifty-one billion, one hundred fifty-six million, one hundred forty-four thousand, five hundred nineteen".