165564476863 has 2 divisors, whose sum is σ = 165564476864. Its totient is φ = 165564476862.

The previous prime is 165564476843. The next prime is 165564476873. The reversal of 165564476863 is 368674465561.

It is a strong prime.

It is an emirp because it is prime and its reverse (368674465561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165564476863 - 2³³ = 156974542271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165564476843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82782238431 + 82782238432.

It is an arithmetic number, because the mean of its divisors is an integer number (82782238432).

Almost surely, 2^165564476863 is an apocalyptic number.

165564476863 is a deficient number, since it is larger than the sum of its proper divisors (1).

165564476863 is an equidigital number, since it uses as much as digits as its factorization.

165564476863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87091200, while the sum is 61.

The spelling of 165564476863 in words is "one hundred sixty-five billion, five hundred sixty-four million, four hundred seventy-six thousand, eight hundred sixty-three".