551316780 has 240 divisors, whose sum is σ = 2011496256. Its totient is φ = 123793920.

The previous prime is 551316763. The next prime is 551316781. The reversal of 551316780 is 87613155.

551316780 is a `hidden beast` number, since 5 + 513 + 1 + 67 + 80 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (551316781) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 691342 + ... + 692138.

Almost surely, 2^551316780 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 551316780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005748128).

551316780 is an abundant number, since it is smaller than the sum of its proper divisors (1460179476).

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

551316780 is a wasteful number, since it uses less digits than its factorization.

551316780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 551316780 is about 23480.1358599136. The cubic root of 551316780 is about 819.9746075817.

The spelling of 551316780 in words is "five hundred fifty-one million, three hundred sixteen thousand, seven hundred eighty".