1655000000 has 112 divisors (see below), whose sum is σ = 4117567584. Its totient is φ = 660000000.

The previous prime is 1654999999. The next prime is 1655000041. The reversal of 1655000000 is 5561.

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 15 ways as a sum of consecutive naturals, for example, 4999835 + ... + 5000165.

Almost surely, 2^1655000000 is an apocalyptic number.

1655000000 is a gapful number since it is divisible by the number (10) 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 1655000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058783792).

1655000000 is an abundant number, since it is smaller than the sum of its proper divisors (2462567584).

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

1655000000 is an frugal number, since it uses more digits than its factorization.

1655000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1655000000 is about 40681.6912136160. The cubic root of 1655000000 is about 1182.8581486029.

Adding to 1655000000 its reverse (5561), we get a palindrome (1655005561).

The spelling of 1655000000 in words is "one billion, six hundred fifty-five million", and thus it is an aban number.