1655551568 has 40 divisors (see below), whose sum is σ = 3503317440. Its totient is φ = 751645440.

The previous prime is 1655551549. The next prime is 1655551627. The reversal of 1655551568 is 8651555561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159893 + ... + 169931.

It is an arithmetic number, because the mean of its divisors is an integer number (87582936).

Almost surely, 2^1655551568 is an apocalyptic number.

It is an amenable number.

1655551568 is an abundant number, since it is smaller than the sum of its proper divisors (1847765872).

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

1655551568 is a wasteful number, since it uses less digits than its factorization.

1655551568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10995 (or 10989 counting only the distinct ones).

The product of its digits is 900000, while the sum is 47.

The square root of 1655551568 is about 40688.4697180909. The cubic root of 1655551568 is about 1182.9895391846.

The spelling of 1655551568 in words is "one billion, six hundred fifty-five million, five hundred fifty-one thousand, five hundred sixty-eight".