1551324880 has 80 divisors (see below), whose sum is σ = 4164733440. Its totient is φ = 526381056.

The previous prime is 1551324877. The next prime is 1551324899. The reversal of 1551324880 is 884231551.

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

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 40041 + ... + 68599.

It is an arithmetic number, because the mean of its divisors is an integer number (52059168).

Almost surely, 2^1551324880 is an apocalyptic number.

1551324880 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 1551324880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082366720).

1551324880 is an abundant number, since it is smaller than the sum of its proper divisors (2613408560).

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

1551324880 is a wasteful number, since it uses less digits than its factorization.

1551324880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28676 (or 28670 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 1551324880 is about 39386.8617688691. The cubic root of 1551324880 is about 1157.6241702132.

The spelling of 1551324880 in words is "one billion, five hundred fifty-one million, three hundred twenty-four thousand, eight hundred eighty".