654878878456 has 96 divisors (see below), whose sum is σ = 1430378323920. Its totient is φ = 279904711680.

The previous prime is 654878878421. The next prime is 654878878457.

654878878456 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654878878457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18462370 + ... + 18497806.

Almost surely, 2^654878878456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 654878878456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715189161960).

654878878456 is an abundant number, since it is smaller than the sum of its proper divisors (775499445464).

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

654878878456 is a wasteful number, since it uses less digits than its factorization.

654878878456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36605 (or 36590 counting only the distinct ones).

The product of its digits is 2890137600, while the sum is 76.

The spelling of 654878878456 in words is "six hundred fifty-four billion, eight hundred seventy-eight million, eight hundred seventy-eight thousand, four hundred fifty-six".