655209337688 has 8 divisors (see below), whose sum is σ = 1228517508180. Its totient is φ = 327604668840.

The previous prime is 655209337633. The next prime is 655209337703. The reversal of 655209337688 is 886733902556.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 655209337688.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40950583598 + ... + 40950583613.

Almost surely, 2^655209337688 is an apocalyptic number.

It is an amenable number.

655209337688 is a deficient number, since it is larger than the sum of its proper divisors (573308170492).

655209337688 is a wasteful number, since it uses less digits than its factorization.

655209337688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81901167217 (or 81901167213 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 62.

The spelling of 655209337688 in words is "six hundred fifty-five billion, two hundred nine million, three hundred thirty-seven thousand, six hundred eighty-eight".