1655890816 has 32 divisors (see below), whose sum is σ = 3300724080. Its totient is φ = 827473920.

The previous prime is 1655890799. The next prime is 1655890829. The reversal of 1655890816 is 6180985561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 1655890816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367296 + ... + 371776.

Almost surely, 2^1655890816 is an apocalyptic number.

1655890816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1655890816 is a deficient number, since it is larger than the sum of its proper divisors (1644833264).

1655890816 is an equidigital number, since it uses as much as digits as its factorization.

1655890816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7382 (or 7370 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 1655890816 is about 40692.6383514267. The cubic root of 1655890816 is about 1183.0703379213.

The spelling of 1655890816 in words is "one billion, six hundred fifty-five million, eight hundred ninety thousand, eight hundred sixteen".