545911509 has 64 divisors (see below), whose sum is σ = 907941888. Its totient is φ = 287020800.

The previous prime is 545911481. The next prime is 545911517. The reversal of 545911509 is 905119545.

It is not a de Polignac number, because 545911509 - 2⁸ = 545911253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545911529) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 601434 + ... + 602340.

It is an arithmetic number, because the mean of its divisors is an integer number (14186592).

Almost surely, 2^545911509 is an apocalyptic number.

It is an amenable number.

545911509 is a deficient number, since it is larger than the sum of its proper divisors (362030379).

545911509 is a wasteful number, since it uses less digits than its factorization.

545911509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018.

The product of its (nonzero) digits is 40500, while the sum is 39.

The square root of 545911509 is about 23364.7492817706. The cubic root of 545911509 is about 817.2860448795.

The spelling of 545911509 in words is "five hundred forty-five million, nine hundred eleven thousand, five hundred nine".