655127008720 has 80 divisors (see below), whose sum is σ = 1604734433280. Its totient is φ = 248042304000.

The previous prime is 655127008699. The next prime is 655127008729. The reversal of 655127008720 is 27800721556.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655127008729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562290 + ... + 1936750.

It is an arithmetic number, because the mean of its divisors is an integer number (20059180416).

Almost surely, 2^655127008720 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 655127008720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (802367216640).

655127008720 is an abundant number, since it is smaller than the sum of its proper divisors (949607424560).

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

655127008720 is a wasteful number, since it uses less digits than its factorization.

655127008720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375644 (or 375638 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 655127008720 in words is "six hundred fifty-five billion, one hundred twenty-seven million, eight thousand, seven hundred twenty".