551343641504 has 96 divisors (see below), whose sum is σ = 1158517760400. Its totient is φ = 257381367808.

The previous prime is 551343641473. The next prime is 551343641539. The reversal of 551343641504 is 405146343155.

It can be written as a sum of positive squares in 8 ways, for example, as 516989760400 + 34353881104 = 719020^2 + 185348^2 .

It is a super-2 number, since 2×551343641504² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69461024 + ... + 69468960.

Almost surely, 2^551343641504 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 551343641504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (579258880200).

551343641504 is an abundant number, since it is smaller than the sum of its proper divisors (607174118896).

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

551343641504 is a wasteful number, since it uses less digits than its factorization.

551343641504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8970 (or 8962 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 551343641504 its reverse (405146343155), we get a palindrome (956489984659).

The spelling of 551343641504 in words is "five hundred fifty-one billion, three hundred forty-three million, six hundred forty-one thousand, five hundred four".