551916745380 has 960 divisors, whose sum is σ = 2399861882880. Its totient is φ = 102437913600.

The previous prime is 551916745357. The next prime is 551916745399. The reversal of 551916745380 is 83547619155.

551916745380 is a `hidden beast` number, since 5 + 5 + 191 + 6 + 74 + 5 + 380 = 666.

It is a super-2 number, since 2×551916745380² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 50264731 + ... + 50275709.

It is an arithmetic number, because the mean of its divisors is an integer number (2499856128).

Almost surely, 2^551916745380 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 551916745380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199930941440).

551916745380 is an abundant number, since it is smaller than the sum of its proper divisors (1847945137500).

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

551916745380 is a wasteful number, since it uses less digits than its factorization.

551916745380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062 (or 11051 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 551916745380 in words is "five hundred fifty-one billion, nine hundred sixteen million, seven hundred forty-five thousand, three hundred eighty".