545871870 has 144 divisors (see below), whose sum is σ = 1558597248. Its totient is φ = 132387840.

The previous prime is 545871829. The next prime is 545871871. The reversal of 545871870 is 78178545.

It is a happy number.

545871870 is a `hidden beast` number, since 54 + 587 + 18 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545871871) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 805972 + ... + 806648.

It is an arithmetic number, because the mean of its divisors is an integer number (10823592).

Almost surely, 2^545871870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545871870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779298624).

545871870 is an abundant number, since it is smaller than the sum of its proper divisors (1012725378).

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

545871870 is a wasteful number, since it uses less digits than its factorization.

545871870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 735 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 545871870 is about 23363.9010013311. The cubic root of 545871870 is about 817.2662631718.

The spelling of 545871870 in words is "five hundred forty-five million, eight hundred seventy-one thousand, eight hundred seventy".