6431540550 has 72 divisors (see below), whose sum is σ = 16481710728. Its totient is φ = 1659715200.

The previous prime is 6431540537. The next prime is 6431540593. The reversal of 6431540550 is 550451346.

6431540550 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 121842 + ... + 166458.

It is an arithmetic number, because the mean of its divisors is an integer number (228912649).

Almost surely, 2^6431540550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6431540550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8240855364).

6431540550 is an abundant number, since it is smaller than the sum of its proper divisors (10050170178).

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

6431540550 is a wasteful number, since it uses less digits than its factorization.

6431540550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44694 (or 44658 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 6431540550 is about 80196.8861614963. The cubic root of 6431540550 is about 1859.6805006771.

Adding to 6431540550 its reverse (550451346), we get a palindrome (6981991896).

The spelling of 6431540550 in words is "six billion, four hundred thirty-one million, five hundred forty thousand, five hundred fifty".