655776372240 has 360 divisors, whose sum is σ = 2563128621144. Its totient is φ = 149624217600.

The previous prime is 655776372227. The next prime is 655776372259. The reversal of 655776372240 is 42273677556.

It is a happy number.

655776372240 is a `hidden beast` number, since 6 + 5 + 577 + 6 + 3 + 7 + 22 + 40 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4875949584 + 650900422656 = 69828^2 + 806784^2 .

It is a tau number, because it is divible by the number of its divisors (360).

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1259650 + ... + 1702430.

Almost surely, 2^655776372240 is an apocalyptic number.

655776372240 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 655776372240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281564310572).

655776372240 is an abundant number, since it is smaller than the sum of its proper divisors (1907352248904).

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

655776372240 is a wasteful number, since it uses less digits than its factorization.

655776372240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442839 (or 442819 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 54.

The spelling of 655776372240 in words is "six hundred fifty-five billion, seven hundred seventy-six million, three hundred seventy-two thousand, two hundred forty".