8551745921664 has 224 divisors, whose sum is σ = 27865461918240. Its totient is φ = 2591437847040.

The previous prime is 8551745921651. The next prime is 8551745921681. The reversal of 8551745921664 is 4661295471558.

It is a happy number.

8551745921664 is a `hidden beast` number, since 8 + 5 + 5 + 17 + 459 + 2 + 166 + 4 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3139332 + ... + 5192195.

Almost surely, 2^{8551745921664} is an apocalyptic number.

It is an amenable number.

8551745921664 is an abundant number, since it is smaller than the sum of its proper divisors (19313715996576).

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

8551745921664 is an equidigital number, since it uses as much as digits as its factorization.

8551745921664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331570 (or 8331543 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 8551745921664 in words is "eight trillion, five hundred fifty-one billion, seven hundred forty-five million, nine hundred twenty-one thousand, six hundred sixty-four".