655855199856 has 120 divisors (see below), whose sum is σ = 1986224123520. Its totient is φ = 209113223616.

The previous prime is 655855199803. The next prime is 655855199891. The reversal of 655855199856 is 658991558556.

655855199856 is a `hidden beast` number, since 6 + 5 + 58 + 5 + 519 + 9 + 8 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3577686 + ... + 3756533.

It is an arithmetic number, because the mean of its divisors is an integer number (16551867696).

Almost surely, 2^655855199856 is an apocalyptic number.

It is an amenable number.

655855199856 is an abundant number, since it is smaller than the sum of its proper divisors (1330368923664).

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

655855199856 is a wasteful number, since it uses less digits than its factorization.

655855199856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334265 (or 7334247 counting only the distinct ones).

The product of its digits is 583200000, while the sum is 72.

The spelling of 655855199856 in words is "six hundred fifty-five billion, eight hundred fifty-five million, one hundred ninety-nine thousand, eight hundred fifty-six".