551655552 has 128 divisors (see below), whose sum is σ = 1747676160. Its totient is φ = 150746112.

The previous prime is 551655539. The next prime is 551655569. The reversal of 551655552 is 255556155.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 551655552.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57363 + ... + 66285.

It is an arithmetic number, because the mean of its divisors is an integer number (13653720).

Almost surely, 2^551655552 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 551655552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873838080).

551655552 is an abundant number, since it is smaller than the sum of its proper divisors (1196020608).

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

551655552 is a wasteful number, since it uses less digits than its factorization.

551655552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970 (or 8958 counting only the distinct ones).

The product of its digits is 187500, while the sum is 39.

The square root of 551655552 is about 23487.3487648138. The cubic root of 551655552 is about 820.1425252955.

The spelling of 551655552 in words is "five hundred fifty-one million, six hundred fifty-five thousand, five hundred fifty-two".