4540432120421 has 12 divisors (see below), whose sum is σ = 4677290775360. Its totient is φ = 4407467240880.

The previous prime is 4540432120397. The next prime is 4540432120453. The reversal of 4540432120421 is 1240212340454.

It is a de Polignac number, because none of the positive numbers 2^k-4540432120421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540432120321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3257531 + ... + 4437608.

It is an arithmetic number, because the mean of its divisors is an integer number (389774231280).

Almost surely, 2^{4540432120421} is an apocalyptic number.

It is an amenable number.

4540432120421 is a deficient number, since it is larger than the sum of its proper divisors (136858654939).

4540432120421 is an equidigital number, since it uses as much as digits as its factorization.

4540432120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695644 (or 7695607 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 4540432120421 its reverse (1240212340454), we get a palindrome (5780644460875).

The spelling of 4540432120421 in words is "four trillion, five hundred forty billion, four hundred thirty-two million, one hundred twenty thousand, four hundred twenty-one".