63111871901 has 24 divisors (see below), whose sum is σ = 72465615144. Its totient is φ = 54750259200.

The previous prime is 63111871897. The next prime is 63111871903. The reversal of 63111871901 is 10917811136.

It can be written as a sum of positive squares in 12 ways, for example, as 1367076676 + 61744795225 = 36974^2 + 248485^2 .

It is not a de Polignac number, because 63111871901 - 2² = 63111871897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63111871903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1998305 + ... + 2029641.

It is an arithmetic number, because the mean of its divisors is an integer number (3019400631).

Almost surely, 2^63111871901 is an apocalyptic number.

It is an amenable number.

63111871901 is a deficient number, since it is larger than the sum of its proper divisors (9353743243).

63111871901 is a wasteful number, since it uses less digits than its factorization.

63111871901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32081 (or 32068 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 63111871901 in words is "sixty-three billion, one hundred eleven million, eight hundred seventy-one thousand, nine hundred one".