1655065664 has 112 divisors (see below), whose sum is σ = 3873252096. Its totient is φ = 687052800.

The previous prime is 1655065631. The next prime is 1655065681. The reversal of 1655065664 is 4665605561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1939862 + ... + 1940714.

It is an arithmetic number, because the mean of its divisors is an integer number (34582608).

Almost surely, 2^1655065664 is an apocalyptic number.

1655065664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1655065664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936626048).

1655065664 is an abundant number, since it is smaller than the sum of its proper divisors (2218186432).

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

1655065664 is an equidigital number, since it uses as much as digits as its factorization.

1655065664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 1655065664 is about 40682.4982517052. The cubic root of 1655065664 is about 1182.8737921418.

The spelling of 1655065664 in words is "one billion, six hundred fifty-five million, sixty-five thousand, six hundred sixty-four".