63603672165 has 96 divisors (see below), whose sum is σ = 121658689152. Its totient is φ = 30483648000.

The previous prime is 63603672161. The next prime is 63603672241. The reversal of 63603672165 is 56127630636.

63603672165 is a `hidden beast` number, since 636 + 0 + 3 + 6 + 7 + 2 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 63603672165 - 2² = 63603672161 is a prime.

It is a super-2 number, since 2×63603672165² (a number of 22 digits) contains 22 as substring.

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 63603672165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63603672161) 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 95 ways as a sum of consecutive naturals, for example, 17960295 + ... + 17963835.

It is an arithmetic number, because the mean of its divisors is an integer number (1267278012).

Almost surely, 2^63603672165 is an apocalyptic number.

It is an amenable number.

63603672165 is a deficient number, since it is larger than the sum of its proper divisors (58055016987).

63603672165 is a wasteful number, since it uses less digits than its factorization.

63603672165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3968 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 63603672165 in words is "sixty-three billion, six hundred three million, six hundred seventy-two thousand, one hundred sixty-five".