165583448749 has 2 divisors, whose sum is σ = 165583448750. Its totient is φ = 165583448748.

The previous prime is 165583448699. The next prime is 165583448753. The reversal of 165583448749 is 947844385561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138593887524 + 26989561225 = 372282^2 + 164285^2 .

It is a cyclic number.

It is not a de Polignac number, because 165583448749 - 2¹⁹ = 165582924461 is a prime.

It is a super-2 number, since 2×165583448749² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165583448759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82791724374 + 82791724375.

It is an arithmetic number, because the mean of its divisors is an integer number (82791724375).

Almost surely, 2^165583448749 is an apocalyptic number.

It is an amenable number.

165583448749 is a deficient number, since it is larger than the sum of its proper divisors (1).

165583448749 is an equidigital number, since it uses as much as digits as its factorization.

165583448749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116121600, while the sum is 64.

The spelling of 165583448749 in words is "one hundred sixty-five billion, five hundred eighty-three million, four hundred forty-eight thousand, seven hundred forty-nine".