63945259875 has 144 divisors (see below), whose sum is σ = 139949619264. Its totient is φ = 27511603200.

The previous prime is 63945259843. The next prime is 63945259877. The reversal of 63945259875 is 57895254936.

63945259875 is a `hidden beast` number, since 6 + 39 + 4 + 5 + 2 + 598 + 7 + 5 = 666.

It is a Cunningham number, because it is equal to 252874²-1.

It is not a de Polignac number, because 63945259875 - 2⁵ = 63945259843 is a prime.

It is a super-5 number, since 5×63945259875⁵ (a number of 55 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (63945259877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2261827 + ... + 2289923.

It is an arithmetic number, because the mean of its divisors is an integer number (971872356).

Almost surely, 2^63945259875 is an apocalyptic number.

63945259875 is an abundant number, since it is smaller than the sum of its proper divisors (76004359389).

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

63945259875 is a wasteful number, since it uses less digits than its factorization.

63945259875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28159 (or 28129 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 63.

The spelling of 63945259875 in words is "sixty-three billion, nine hundred forty-five million, two hundred fifty-nine thousand, eight hundred seventy-five".