655689457964550 has 24 divisors (see below), whose sum is σ = 1626109855752456. Its totient is φ = 174850522123840.

The previous prime is 655689457964483. The next prime is 655689457964579. The reversal of 655689457964550 is 55469754986556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2185631526399 + ... + 2185631526698.

It is an arithmetic number, because the mean of its divisors is an integer number (67754577323019).

Almost surely, 2^{655689457964550} is an apocalyptic number.

655689457964550 is an abundant number, since it is smaller than the sum of its proper divisors (970420397787906).

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

655689457964550 is a wasteful number, since it uses less digits than its factorization.

655689457964550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4371263053112 (or 4371263053107 counting only the distinct ones).

The product of its (nonzero) digits is 48988800000, while the sum is 84.

The spelling of 655689457964550 in words is "six hundred fifty-five trillion, six hundred eighty-nine billion, four hundred fifty-seven million, nine hundred sixty-four thousand, five hundred fifty".