551481065420 has 48 divisors (see below), whose sum is σ = 1204466471040. Its totient is φ = 211913604864.

The previous prime is 551481065363. The next prime is 551481065423. The reversal of 551481065420 is 24560184155.

551481065420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (551481065423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4658279 + ... + 4775198.

It is an arithmetic number, because the mean of its divisors is an integer number (25093051480).

Almost surely, 2^551481065420 is an apocalyptic number.

It is an amenable number.

551481065420 is an abundant number, since it is smaller than the sum of its proper divisors (652985405620).

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

551481065420 is a wasteful number, since it uses less digits than its factorization.

551481065420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9433602 (or 9433600 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 551481065420 in words is "five hundred fifty-one billion, four hundred eighty-one million, sixty-five thousand, four hundred twenty".