55403646165 has 32 divisors (see below), whose sum is σ = 112566140160. Its totient is φ = 25327380672.

The previous prime is 55403646139. The next prime is 55403646217. The reversal of 55403646165 is 56164630455.

55403646165 is a `hidden beast` number, since 5 + 540 + 3 + 6 + 46 + 1 + 65 = 666.

It is not a de Polignac number, because 55403646165 - 2⁹ = 55403645653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55403646165.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 29313154 + ... + 29315043.

It is an arithmetic number, because the mean of its divisors is an integer number (3517691880).

Almost surely, 2^55403646165 is an apocalyptic number.

It is an amenable number.

55403646165 is an abundant number, since it is smaller than the sum of its proper divisors (57162493995).

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

55403646165 is a wasteful number, since it uses less digits than its factorization.

55403646165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58628218 (or 58628212 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 55403646165 in words is "fifty-five billion, four hundred three million, six hundred forty-six thousand, one hundred sixty-five".