1545868880 has 80 divisors (see below), whose sum is σ = 3885703680. Its totient is φ = 569949696.

The previous prime is 1545868829. The next prime is 1545868889. The reversal of 1545868880 is 888685451.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545868889) by changing a digit.

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, 42497 + ... + 69983.

It is an arithmetic number, because the mean of its divisors is an integer number (48571296).

Almost surely, 2^1545868880 is an apocalyptic number.

1545868880 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 1545868880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1942851840).

1545868880 is an abundant number, since it is smaller than the sum of its proper divisors (2339834800).

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

1545868880 is a wasteful number, since it uses less digits than its factorization.

1545868880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27556 (or 27550 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 53.

The square root of 1545868880 is about 39317.5390888087. The cubic root of 1545868880 is about 1156.2654570907.

The spelling of 1545868880 in words is "one billion, five hundred forty-five million, eight hundred sixty-eight thousand, eight hundred eighty".