6481185511566 has 8 divisors (see below), whose sum is σ = 12962371023144. Its totient is φ = 2160395170520.

The previous prime is 6481185511547. The next prime is 6481185511583. The reversal of 6481185511566 is 6651155811846.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

6481185511566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540098792625 + ... + 540098792636.

It is an arithmetic number, because the mean of its divisors is an integer number (1620296377893).

Almost surely, 2^{6481185511566} is an apocalyptic number.

6481185511566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6481185511566 is a wasteful number, since it uses less digits than its factorization.

6481185511566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080197585266.

The product of its digits is 6912000, while the sum is 57.

The spelling of 6481185511566 in words is "six trillion, four hundred eighty-one billion, one hundred eighty-five million, five hundred eleven thousand, five hundred sixty-six".