551233421928 has 1152 divisors, whose sum is σ = 1982645683200. Its totient is φ = 142655385600.

The previous prime is 551233421917. The next prime is 551233421933. The reversal of 551233421928 is 829124332155.

551233421928 is a `hidden beast` number, since 5 + 512 + 3 + 3 + 42 + 1 + 92 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

Its product of digits (518400) is a multiple of the sum of its prime divisors (270).

It is an unprimeable number.

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 287 ways as a sum of consecutive naturals, for example, 3511040826 + ... + 3511040982.

It is an arithmetic number, because the mean of its divisors is an integer number (1721046600).

Almost surely, 2^551233421928 is an apocalyptic number.

551233421928 is a gapful number since it is divisible by the number (58) 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 551233421928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991322841600).

551233421928 is an abundant number, since it is smaller than the sum of its proper divisors (1431412261272).

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

551233421928 is a wasteful number, since it uses less digits than its factorization.

551233421928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 270 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 551233421928 in words is "five hundred fifty-one billion, two hundred thirty-three million, four hundred twenty-one thousand, nine hundred twenty-eight".