551329444540 has 96 divisors (see below), whose sum is σ = 1339641676800. Its totient is φ = 186682129920.

The previous prime is 551329444537. The next prime is 551329444573. The reversal of 551329444540 is 45444923155.

551329444540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10677385 + ... + 10728895.

It is an arithmetic number, because the mean of its divisors is an integer number (13954600800).

Almost surely, 2^551329444540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551329444540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669820838400).

551329444540 is an abundant number, since it is smaller than the sum of its proper divisors (788312232260).

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

551329444540 is a wasteful number, since it uses less digits than its factorization.

551329444540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52475 (or 52473 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 551329444540 in words is "five hundred fifty-one billion, three hundred twenty-nine million, four hundred forty-four thousand, five hundred forty".