63155311065 has 128 divisors (see below), whose sum is σ = 140147159040. Its totient is φ = 26215142400.

The previous prime is 63155311039. The next prime is 63155311099. The reversal of 63155311065 is 56011355136.

63155311065 is a `hidden beast` number, since 6 + 3 + 15 + 531 + 106 + 5 = 666.

It is not a de Polignac number, because 63155311065 - 2⁸ = 63155310809 is a prime.

It is a super-2 number, since 2×63155311065² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10090417 + ... + 10096673.

It is an arithmetic number, because the mean of its divisors is an integer number (1094899680).

Almost surely, 2^63155311065 is an apocalyptic number.

It is an amenable number.

63155311065 is an abundant number, since it is smaller than the sum of its proper divisors (76991847975).

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

63155311065 is a wasteful number, since it uses less digits than its factorization.

63155311065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7260 (or 7254 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 63155311065 in words is "sixty-three billion, one hundred fifty-five million, three hundred eleven thousand, sixty-five".