142665174509 has 24 divisors (see below), whose sum is σ = 168916506360. Its totient is φ = 119690588160.

The previous prime is 142665174469. The next prime is 142665174511. The reversal of 142665174509 is 905471566241.

It can be written as a sum of positive squares in 4 ways, for example, as 26496677284 + 116168497225 = 162778^2 + 340835^2 .

It is not a de Polignac number, because 142665174509 - 2¹⁶ = 142665108973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142665174209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9016397 + ... + 9032205.

It is an arithmetic number, because the mean of its divisors is an integer number (7038187765).

Almost surely, 2^142665174509 is an apocalyptic number.

It is an amenable number.

142665174509 is a deficient number, since it is larger than the sum of its proper divisors (26251331851).

142665174509 is a wasteful number, since it uses less digits than its factorization.

142665174509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21581 (or 21570 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 142665174509 in words is "one hundred forty-two billion, six hundred sixty-five million, one hundred seventy-four thousand, five hundred nine".