165394253376047 has 2 divisors, whose sum is σ = 165394253376048. Its totient is φ = 165394253376046.

The previous prime is 165394253375993. The next prime is 165394253376049. The reversal of 165394253376047 is 740673352493561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165394253376047 - 2³² = 165389958408751 is a prime.

Together with 165394253376049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165394253376049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82697126688023 + 82697126688024.

It is an arithmetic number, because the mean of its divisors is an integer number (82697126688024).

Almost surely, 2^{165394253376047} is an apocalyptic number.

165394253376047 is a deficient number, since it is larger than the sum of its proper divisors (1).

165394253376047 is an equidigital number, since it uses as much as digits as its factorization.

165394253376047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 342921600, while the sum is 65.

The spelling of 165394253376047 in words is "one hundred sixty-five trillion, three hundred ninety-four billion, two hundred fifty-three million, three hundred seventy-six thousand, forty-seven".