6431351340 has 48 divisors (see below), whose sum is σ = 18011266560. Its totient is φ = 1714695360.

The previous prime is 6431351321. The next prime is 6431351347. The reversal of 6431351340 is 431531346.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 6431351298 and 6431351307.

It is not an unprimeable number, because it can be changed into a prime (6431351347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586831 + ... + 597689.

It is an arithmetic number, because the mean of its divisors is an integer number (375234720).

Almost surely, 2^6431351340 is an apocalyptic number.

6431351340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6431351340 is an abundant number, since it is smaller than the sum of its proper divisors (11579915220).

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

6431351340 is a wasteful number, since it uses less digits than its factorization.

6431351340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20742 (or 20740 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 6431351340 is about 80195.7064935524. The cubic root of 6431351340 is about 1859.6622638023.

Adding to 6431351340 its reverse (431531346), we get a palindrome (6862882686).

The spelling of 6431351340 in words is "six billion, four hundred thirty-one million, three hundred fifty-one thousand, three hundred forty".