551969964 has 240 divisors, whose sum is σ = 1803554368. Its totient is φ = 143327232.

The previous prime is 551969947. The next prime is 551969989. The reversal of 551969964 is 469969155.

551969964 is a `hidden beast` number, since 5 + 519 + 69 + 9 + 64 = 666.

It is a super-2 number, since 2×551969964² = 609341682316322592, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 551969964.

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 79 ways as a sum of consecutive naturals, for example, 2859852 + ... + 2860044.

Almost surely, 2^551969964 is an apocalyptic number.

551969964 is a gapful number since it is divisible by the number (54) 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 551969964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901777184).

551969964 is an abundant number, since it is smaller than the sum of its proper divisors (1251584404).

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

551969964 is a wasteful number, since it uses less digits than its factorization.

551969964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 315 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 551969964 is about 23494.0410317170. The cubic root of 551969964 is about 820.2983070916.

The spelling of 551969964 in words is "five hundred fifty-one million, nine hundred sixty-nine thousand, nine hundred sixty-four".