6431881502928 has 320 divisors, whose sum is σ = 19578778877952. Its totient is φ = 1781247836160.

The previous prime is 6431881502927. The next prime is 6431881502939. The reversal of 6431881502928 is 8292051881346.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431881502923) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3528184225 + ... + 3528186047.

Almost surely, 2^{6431881502928} 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 6431881502928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9789389438976).

6431881502928 is an abundant number, since it is smaller than the sum of its proper divisors (13146897375024).

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

6431881502928 is a wasteful number, since it uses less digits than its factorization.

6431881502928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 6431881502928 in words is "six trillion, four hundred thirty-one billion, eight hundred eighty-one million, five hundred two thousand, nine hundred twenty-eight".