654545880 has 128 divisors (see below), whose sum is σ = 2189606400. Its totient is φ = 173923200.

The previous prime is 654545867. The next prime is 654545887. The reversal of 654545880 is 88545456.

654545880 is a `hidden beast` number, since 65 + 4 + 5 + 4 + 588 + 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 (654545887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 356565 + ... + 358395.

It is an arithmetic number, because the mean of its divisors is an integer number (17106300).

Almost surely, 2^654545880 is an apocalyptic number.

654545880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654545880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094803200).

654545880 is an abundant number, since it is smaller than the sum of its proper divisors (1535060520).

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

654545880 is a wasteful number, since it uses less digits than its factorization.

654545880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The square root of 654545880 is about 25584.0942774998. The cubic root of 654545880 is about 868.2538102648.

It can be divided in two parts, 6545 and 45880, that added together give a palindrome (52425).

The spelling of 654545880 in words is "six hundred fifty-four million, five hundred forty-five thousand, eight hundred eighty".