545220721913 has 16 divisors (see below), whose sum is σ = 643240104960. Its totient is φ = 452235441600.

The previous prime is 545220721909. The next prime is 545220721937. The reversal of 545220721913 is 319127022545.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 545220721913 - 2² = 545220721909 is a prime.

It is a super-3 number, since 3×545220721913³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545220721973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5930783 + ... + 6022011.

It is an arithmetic number, because the mean of its divisors is an integer number (40202506560).

Almost surely, 2^545220721913 is an apocalyptic number.

It is an amenable number.

545220721913 is a deficient number, since it is larger than the sum of its proper divisors (98019383047).

545220721913 is a wasteful number, since it uses less digits than its factorization.

545220721913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118808.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 545220721913 in words is "five hundred forty-five billion, two hundred twenty million, seven hundred twenty-one thousand, nine hundred thirteen".