6381887637632 has 64 divisors (see below), whose sum is σ = 13697583845400. Its totient is φ = 2944266092544.

The previous prime is 6381887637617. The next prime is 6381887637659. The reversal of 6381887637632 is 2367367881836.

It can be written as a sum of positive squares in 4 ways, for example, as 6355521672256 + 26365965376 = 2521016^2 + 162376^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3228494 + ... + 4815282.

Almost surely, 2^{6381887637632} 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 6381887637632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6848791922700).

6381887637632 is an abundant number, since it is smaller than the sum of its proper divisors (7315696207768).

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

6381887637632 is a wasteful number, since it uses less digits than its factorization.

6381887637632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589233 (or 1589221 counting only the distinct ones).

The product of its digits is 292626432, while the sum is 68.

The spelling of 6381887637632 in words is "six trillion, three hundred eighty-one billion, eight hundred eighty-seven million, six hundred thirty-seven thousand, six hundred thirty-two".