6403561340 has 48 divisors (see below), whose sum is σ = 15175853280. Its totient is φ = 2248270080.

The previous prime is 6403561327. The next prime is 6403561349. The reversal of 6403561340 is 431653046.

It is a junction number, because it is equal to n+sod(n) for n = 6403561297 and 6403561306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403561349) 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, 495467 + ... + 508226.

It is an arithmetic number, because the mean of its divisors is an integer number (316163610).

Almost surely, 2^6403561340 is an apocalyptic number.

It is an amenable number.

6403561340 is an abundant number, since it is smaller than the sum of its proper divisors (8772291940).

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

6403561340 is a wasteful number, since it uses less digits than its factorization.

6403561340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003742 (or 1003740 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 6403561340 is about 80022.2552793909. The cubic root of 6403561340 is about 1856.9798503364.

The spelling of 6403561340 in words is "six billion, four hundred three million, five hundred sixty-one thousand, three hundred forty".