165167508397 has 2 divisors, whose sum is σ = 165167508398. Its totient is φ = 165167508396.

The previous prime is 165167508353. The next prime is 165167508439. The reversal of 165167508397 is 793805761561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143572030281 + 21595478116 = 378909^2 + 146954^2 .

It is a cyclic number.

It is not a de Polignac number, because 165167508397 - 2¹¹ = 165167506349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165167508347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82583754198 + 82583754199.

It is an arithmetic number, because the mean of its divisors is an integer number (82583754199).

Almost surely, 2^165167508397 is an apocalyptic number.

It is an amenable number.

165167508397 is a deficient number, since it is larger than the sum of its proper divisors (1).

165167508397 is an equidigital number, since it uses as much as digits as its factorization.

165167508397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 165167508397 in words is "one hundred sixty-five billion, one hundred sixty-seven million, five hundred eight thousand, three hundred ninety-seven".