6401431402240 has 144 divisors (see below), whose sum is σ = 17997538813632. Its totient is φ = 2135458086912.

The previous prime is 6401431402187. The next prime is 6401431402253. The reversal of 6401431402240 is 422041341046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9323149 + ... + 9986188.

It is an arithmetic number, because the mean of its divisors is an integer number (124982908428).

Almost surely, 2^{6401431402240} is an apocalyptic number.

It is an amenable number.

6401431402240 is an abundant number, since it is smaller than the sum of its proper divisors (11596107411392).

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

6401431402240 is a wasteful number, since it uses less digits than its factorization.

6401431402240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19309402 (or 19309388 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 6401431402240 its reverse (422041341046), we get a palindrome (6823472743286).

The spelling of 6401431402240 in words is "six trillion, four hundred one billion, four hundred thirty-one million, four hundred two thousand, two hundred forty".