165655419281 has 8 divisors (see below), whose sum is σ = 181191828000. Its totient is φ = 150198481440.

The previous prime is 165655419229. The next prime is 165655419329. The reversal of 165655419281 is 182914556561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165655419281 is a prime.

It is a super-2 number, since 2×165655419281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165655419221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19863356 + ... + 19871693.

It is an arithmetic number, because the mean of its divisors is an integer number (22648978500).

Almost surely, 2^165655419281 is an apocalyptic number.

165655419281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165655419281 is a deficient number, since it is larger than the sum of its proper divisors (15536408719).

165655419281 is a wasteful number, since it uses less digits than its factorization.

165655419281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39735439.

The product of its digits is 2592000, while the sum is 53.

The spelling of 165655419281 in words is "one hundred sixty-five billion, six hundred fifty-five million, four hundred nineteen thousand, two hundred eighty-one".