252165999693149 has 6 divisors (see below), whose sum is σ = 267871840504794. Its totient is φ = 237332705593280.

The previous prime is 252165999693143. The next prime is 252165999693227. The reversal of 252165999693149 is 941396999561252.

It can be written as a sum of positive squares in 3 ways, for example, as 29971737876025 + 222194261817124 = 5474645^2 + 14906182^2 .

It is not a de Polignac number, because 252165999693149 - 2¹⁶ = 252165999627613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252165999693143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 436273355582 + ... + 436273356159.

It is an arithmetic number, because the mean of its divisors is an integer number (44645306750799).

Almost surely, 2^{252165999693149} is an apocalyptic number.

It is an amenable number.

252165999693149 is a deficient number, since it is larger than the sum of its proper divisors (15705840811645).

252165999693149 is an equidigital number, since it uses as much as digits as its factorization.

252165999693149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872546711775 (or 872546711758 counting only the distinct ones).

The product of its digits is 2550916800, while the sum is 80.

The spelling of 252165999693149 in words is "two hundred fifty-two trillion, one hundred sixty-five billion, nine hundred ninety-nine million, six hundred ninety-three thousand, one hundred forty-nine".