545331440421 has 24 divisors (see below), whose sum is σ = 865209309120. Its totient is φ = 329445078336.

The previous prime is 545331440411. The next prime is 545331440449. The reversal of 545331440421 is 124044133545.

545331440421 is a `hidden beast` number, since 54 + 533 + 14 + 40 + 4 + 21 = 666.

It is not a de Polignac number, because 545331440421 - 2⁷ = 545331440293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545331440411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69323736 + ... + 69331601.

It is an arithmetic number, because the mean of its divisors is an integer number (36050387880).

Almost surely, 2^545331440421 is an apocalyptic number.

It is an amenable number.

545331440421 is a deficient number, since it is larger than the sum of its proper divisors (319877868699).

545331440421 is a wasteful number, since it uses less digits than its factorization.

545331440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138655385 (or 138655382 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 545331440421 its reverse (124044133545), we get a palindrome (669375573966).

The spelling of 545331440421 in words is "five hundred forty-five billion, three hundred thirty-one million, four hundred forty thousand, four hundred twenty-one".