2045155560 has 128 divisors (see below), whose sum is σ = 7238246400. Its totient is φ = 452378880.

The previous prime is 2045155531. The next prime is 2045155571. The reversal of 2045155560 is 655515402.

It is a super-2 number, since 2×2045155560² = 8365322529197827200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13230 + ... + 65309.

It is an arithmetic number, because the mean of its divisors is an integer number (56548800).

Almost surely, 2^2045155560 is an apocalyptic number.

2045155560 is a gapful number since it is divisible by the number (20) 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 2045155560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3619123200).

2045155560 is an abundant number, since it is smaller than the sum of its proper divisors (5193090840).

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

2045155560 is a wasteful number, since it uses less digits than its factorization.

2045155560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78591 (or 78587 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 2045155560 is about 45223.3961572989. The cubic root of 2045155560 is about 1269.3326437802.

The spelling of 2045155560 in words is "two billion, forty-five million, one hundred fifty-five thousand, five hundred sixty".