165543476385 has 64 divisors (see below), whose sum is σ = 307353802752. Its totient is φ = 74516530176.

The previous prime is 165543476381. The next prime is 165543476467. The reversal of 165543476385 is 583674345561.

It is not a de Polignac number, because 165543476385 - 2² = 165543476381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165543476381) 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, 30057802 + ... + 30063308.

It is an arithmetic number, because the mean of its divisors is an integer number (4802403168).

Almost surely, 2^165543476385 is an apocalyptic number.

165543476385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165543476385 is a deficient number, since it is larger than the sum of its proper divisors (141810326367).

165543476385 is a wasteful number, since it uses less digits than its factorization.

165543476385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9862.

The product of its digits is 36288000, while the sum is 57.

The spelling of 165543476385 in words is "one hundred sixty-five billion, five hundred forty-three million, four hundred seventy-six thousand, three hundred eighty-five".