165209196375 has 128 divisors (see below), whose sum is σ = 309405358080. Its totient is φ = 86979484800.

The previous prime is 165209196353. The next prime is 165209196377. The reversal of 165209196375 is 573691902561.

165209196375 is a `hidden beast` number, since 1 + 65 + 20 + 9 + 196 + 375 = 666.

It is not a de Polignac number, because 165209196375 - 2⁶ = 165209196311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165209196377) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 88488192 + ... + 88490058.

It is an arithmetic number, because the mean of its divisors is an integer number (2417229360).

Almost surely, 2^165209196375 is an apocalyptic number.

165209196375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165209196375 is a deficient number, since it is larger than the sum of its proper divisors (144196161705).

165209196375 is a wasteful number, since it uses less digits than its factorization.

165209196375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 165209196375 in words is "one hundred sixty-five billion, two hundred nine million, one hundred ninety-six thousand, three hundred seventy-five".