63500131840 has 80 divisors (see below), whose sum is σ = 152387045712. Its totient is φ = 25377439744.

The previous prime is 63500131813. The next prime is 63500131847. The reversal of 63500131840 is 4813100536.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63500131847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3028272 + ... + 3049168.

Almost surely, 2^63500131840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63500131840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76193522856).

63500131840 is an abundant number, since it is smaller than the sum of its proper divisors (88886913872).

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

63500131840 is a wasteful number, since it uses less digits than its factorization.

63500131840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22107 (or 22091 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 63500131840 in words is "sixty-three billion, five hundred million, one hundred thirty-one thousand, eight hundred forty".