6432121651420 has 24 divisors (see below), whose sum is σ = 13631377082400. Its totient is φ = 2549244543552.

The previous prime is 6432121651409. The next prime is 6432121651429. The reversal of 6432121651420 is 241561212346.

It is a self number, because there is not a number n which added to its sum of digits gives 6432121651420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6432121651429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475255080 + ... + 1475259439.

It is an arithmetic number, because the mean of its divisors is an integer number (567974045100).

Almost surely, 2^{6432121651420} is an apocalyptic number.

It is an amenable number.

6432121651420 is an abundant number, since it is smaller than the sum of its proper divisors (7199255430980).

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

6432121651420 is a wasteful number, since it uses less digits than its factorization.

6432121651420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950514637 (or 2950514635 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 6432121651420 its reverse (241561212346), we get a palindrome (6673682863766).

The spelling of 6432121651420 in words is "six trillion, four hundred thirty-two billion, one hundred twenty-one million, six hundred fifty-one thousand, four hundred twenty".