545138556 has 12 divisors (see below), whose sum is σ = 1271989992. Its totient is φ = 181712848.

The previous prime is 545138551. The next prime is 545138569. The reversal of 545138556 is 655831545.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545138551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22714095 + ... + 22714118.

It is an arithmetic number, because the mean of its divisors is an integer number (105999166).

Almost surely, 2^545138556 is an apocalyptic number.

It is an amenable number.

545138556 is an abundant number, since it is smaller than the sum of its proper divisors (726851436).

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

545138556 is a wasteful number, since it uses less digits than its factorization.

545138556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45428220 (or 45428218 counting only the distinct ones).

The product of its digits is 360000, while the sum is 42.

The square root of 545138556 is about 23348.2024147471. The cubic root of 545138556 is about 816.9001324645.

The spelling of 545138556 in words is "five hundred forty-five million, one hundred thirty-eight thousand, five hundred fifty-six".