165599479945872 has 60 divisors (see below), whose sum is σ = 529655479512640. Its totient is φ = 47314137127104.

The previous prime is 165599479945841. The next prime is 165599479945903. The reversal of 165599479945872 is 278549974995561.

165599479945872 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 99 + 479 + 9 + 45 + 8 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (165599479945841) and next prime (165599479945903).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82142598172 + ... + 82142600187.

Almost surely, 2^{165599479945872} is an apocalyptic number.

165599479945872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165599479945872 is an abundant number, since it is smaller than the sum of its proper divisors (364055999566768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165599479945872 is a wasteful number, since it uses less digits than its factorization.

165599479945872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164285198380 (or 164285198371 counting only the distinct ones).

The product of its digits is 61725888000, while the sum is 90.

The spelling of 165599479945872 in words is "one hundred sixty-five trillion, five hundred ninety-nine billion, four hundred seventy-nine million, nine hundred forty-five thousand, eight hundred seventy-two".