654139220000 has 810 divisors, whose sum is σ = 2022749156043. Its totient is φ = 207531072000.

The previous prime is 654139219997. The next prime is 654139220027. The reversal of 654139220000 is 22931456.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 3 ways, for example, as 151236987664 + 502902232336 = 388892^2 + 709156^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=571900.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 15212539979 + ... + 15212540021.

Almost surely, 2^654139220000 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 654139220000

654139220000 is an abundant number, since it is smaller than the sum of its proper divisors (1368609936043).

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

654139220000 is an equidigital number, since it uses as much as digits as its factorization.

654139220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

Multiplying 654139220000 by its sum of digits (32), we get a square (20932455040000 = 4575200²).

654139220000 divided by its sum of digits (32) gives a square (20441850625 = 142975²).

The spelling of 654139220000 in words is "six hundred fifty-four billion, one hundred thirty-nine million, two hundred twenty thousand".