1566216171552 has 48 divisors (see below), whose sum is σ = 4116792097152. Its totient is φ = 521376864000.

The previous prime is 1566216171511. The next prime is 1566216171581. The reversal of 1566216171552 is 2551716126651.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10789923 + ... + 10934114.

It is an arithmetic number, because the mean of its divisors is an integer number (85766502024).

Almost surely, 2^{1566216171552} is an apocalyptic number.

1566216171552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1566216171552 is an abundant number, since it is smaller than the sum of its proper divisors (2550575925600).

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

1566216171552 is a wasteful number, since it uses less digits than its factorization.

1566216171552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724801 (or 21724793 counting only the distinct ones).

The product of its digits is 756000, while the sum is 48.

The spelling of 1566216171552 in words is "one trillion, five hundred sixty-six billion, two hundred sixteen million, one hundred seventy-one thousand, five hundred fifty-two".