545331213155561 has 16 divisors (see below), whose sum is σ = 644717650636800. Its totient is φ = 451379845380240.

The previous prime is 545331213155551. The next prime is 545331213155579. The reversal of 545331213155561 is 165551312133545.

It is not a de Polignac number, because 545331213155561 - 2⁶ = 545331213155497 is a prime.

It is a super-2 number, since 2×545331213155561² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545331213155551) 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, 2690527211 + ... + 2690729888.

It is an arithmetic number, because the mean of its divisors is an integer number (40294853164800).

Almost surely, 2^{545331213155561} is an apocalyptic number.

It is an amenable number.

545331213155561 is a deficient number, since it is larger than the sum of its proper divisors (99386437481239).

545331213155561 is a wasteful number, since it uses less digits than its factorization.

545331213155561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5381257604.

The product of its digits is 4050000, while the sum is 50.

The spelling of 545331213155561 in words is "five hundred forty-five trillion, three hundred thirty-one billion, two hundred thirteen million, one hundred fifty-five thousand, five hundred sixty-one".