551770128 has 360 divisors, whose sum is σ = 1982373120. Its totient is φ = 140175360.

The previous prime is 551770123. The next prime is 551770129. The reversal of 551770128 is 821077155.

It is a super-3 number, since 3×551770128³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 551770092 and 551770101.

It is not an unprimeable number, because it can be changed into a prime (551770123) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6984393 + ... + 6984471.

It is an arithmetic number, because the mean of its divisors is an integer number (5506592).

Almost surely, 2^551770128 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 551770128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991186560).

551770128 is an abundant number, since it is smaller than the sum of its proper divisors (1430602992).

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

551770128 is a wasteful number, since it uses less digits than its factorization.

551770128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 551770128 is about 23489.7877385046. The cubic root of 551770128 is about 820.1993011494.

The spelling of 551770128 in words is "five hundred fifty-one million, seven hundred seventy thousand, one hundred twenty-eight".