551664207360 has 1280 divisors, whose sum is σ = 2367362764800. Its totient is φ = 119042998272.

The previous prime is 551664207299. The next prime is 551664207379. The reversal of 551664207360 is 63702466155.

551664207360 is a `hidden beast` number, since 5 + 5 + 166 + 420 + 7 + 3 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 990420202 + ... + 990420758.

It is an arithmetic number, because the mean of its divisors is an integer number (1849502160).

Almost surely, 2^551664207360 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 551664207360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1183681382400).

551664207360 is an abundant number, since it is smaller than the sum of its proper divisors (1815698557440).

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

551664207360 is a wasteful number, since it uses less digits than its factorization.

551664207360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 551664207360 in words is "five hundred fifty-one billion, six hundred sixty-four million, two hundred seven thousand, three hundred sixty".