655620640555 has 8 divisors (see below), whose sum is σ = 813873898800. Its totient is φ = 506410425696.

The previous prime is 655620640501. The next prime is 655620640583. The reversal of 655620640555 is 555046026556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 655620640555 - 2¹¹ = 655620638507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 655620640499 and 655620640508.

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 7 ways as a sum of consecutive naturals, for example, 2260760685 + ... + 2260760974.

It is an arithmetic number, because the mean of its divisors is an integer number (101734237350).

Almost surely, 2^655620640555 is an apocalyptic number.

655620640555 is a deficient number, since it is larger than the sum of its proper divisors (158253258245).

655620640555 is a wasteful number, since it uses less digits than its factorization.

655620640555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4521521693.

The product of its (nonzero) digits is 5400000, while the sum is 49.

The spelling of 655620640555 in words is "six hundred fifty-five billion, six hundred twenty million, six hundred forty thousand, five hundred fifty-five".