165143142251625 has 64 divisors (see below), whose sum is σ = 284358380716800. Its totient is φ = 85013981696000.

The previous prime is 165143142251621. The next prime is 165143142251669. The reversal of 165143142251625 is 526152241341561.

It is not a de Polignac number, because 165143142251625 - 2² = 165143142251621 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165143142251621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34407241 + ... + 38912009.

It is an arithmetic number, because the mean of its divisors is an integer number (4443099698700).

Almost surely, 2^{165143142251625} is an apocalyptic number.

165143142251625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165143142251625 is a deficient number, since it is larger than the sum of its proper divisors (119215238465175).

165143142251625 is a wasteful number, since it uses less digits than its factorization.

165143142251625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4508187 (or 4508177 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 165143142251625 in words is "one hundred sixty-five trillion, one hundred forty-three billion, one hundred forty-two million, two hundred fifty-one thousand, six hundred twenty-five".