545421015440 has 80 divisors (see below), whose sum is σ = 1451650040832. Its totient is φ = 186693299712.

The previous prime is 545421015421. The next prime is 545421015449. The reversal of 545421015440 is 44510124545.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 545421015440.

It is not an unprimeable number, because it can be changed into a prime (545421015449) 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, 462359 + ... + 1142198.

Almost surely, 2^545421015440 is an apocalyptic number.

It is an amenable number.

545421015440 is an abundant number, since it is smaller than the sum of its proper divisors (906229025392).

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

545421015440 is a wasteful number, since it uses less digits than its factorization.

545421015440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605184 (or 1605178 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 545421015440 its reverse (44510124545), we get a palindrome (589931139985).

The spelling of 545421015440 in words is "five hundred forty-five billion, four hundred twenty-one million, fifteen thousand, four hundred forty".