655646646556 has 48 divisors (see below), whose sum is σ = 1265254244352. Its totient is φ = 294796872000.

The previous prime is 655646646547. The next prime is 655646646601.

655646646556 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×655646646556² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4762765 + ... + 4898491.

It is an arithmetic number, because the mean of its divisors is an integer number (26359463424).

Almost surely, 2^655646646556 is an apocalyptic number.

It is an amenable number.

655646646556 is a deficient number, since it is larger than the sum of its proper divisors (609607597796).

655646646556 is a wasteful number, since it uses less digits than its factorization.

655646646556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136930 (or 136928 counting only the distinct ones).

The product of its digits is 466560000, while the sum is 64.

The spelling of 655646646556 in words is "six hundred fifty-five billion, six hundred forty-six million, six hundred forty-six thousand, five hundred fifty-six".