655815200080 has 20 divisors (see below), whose sum is σ = 1524770340372. Its totient is φ = 262326080000.

The previous prime is 655815200077. The next prime is 655815200149. The reversal of 655815200080 is 80002518556.

It can be written as a sum of positive squares in 2 ways, for example, as 396310539024 + 259504661056 = 629532^2 + 509416^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4098844921 + ... + 4098845080.

Almost surely, 2^655815200080 is an apocalyptic number.

It is an amenable number.

655815200080 is an abundant number, since it is smaller than the sum of its proper divisors (868955140292).

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

655815200080 is a wasteful number, since it uses less digits than its factorization.

655815200080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8197690014 (or 8197690008 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 655815200080 in words is "six hundred fifty-five billion, eight hundred fifteen million, two hundred thousand, eighty".