8141531640 has 64 divisors (see below), whose sum is σ = 26645016960. Its totient is φ = 1973704320.

The previous prime is 8141531611. The next prime is 8141531641. The reversal of 8141531640 is 461351418.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8141531641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3082594 + ... + 3085233.

It is an arithmetic number, because the mean of its divisors is an integer number (416328390).

Almost surely, 2^8141531640 is an apocalyptic number.

It is an amenable number.

8141531640 is an abundant number, since it is smaller than the sum of its proper divisors (18503485320).

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

8141531640 is a wasteful number, since it uses less digits than its factorization.

8141531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6167852 (or 6167848 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 8141531640 is about 90230.4363283255. The cubic root of 8141531640 is about 2011.7254261839.

The spelling of 8141531640 in words is "eight billion, one hundred forty-one million, five hundred thirty-one thousand, six hundred forty".