165515052570671 has 2 divisors, whose sum is σ = 165515052570672. Its totient is φ = 165515052570670.

The previous prime is 165515052570583. The next prime is 165515052570709. The reversal of 165515052570671 is 176075250515561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165515052570671 - 2²⁶ = 165514985461807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165515052572671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82757526285335 + 82757526285336.

It is an arithmetic number, because the mean of its divisors is an integer number (82757526285336).

Almost surely, 2^{165515052570671} is an apocalyptic number.

165515052570671 is a deficient number, since it is larger than the sum of its proper divisors (1).

165515052570671 is an equidigital number, since it uses as much as digits as its factorization.

165515052570671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11025000, while the sum is 56.

The spelling of 165515052570671 in words is "one hundred sixty-five trillion, five hundred fifteen billion, fifty-two million, five hundred seventy thousand, six hundred seventy-one".