1217171548966 has 16 divisors (see below), whose sum is σ = 1828261119744. Its totient is φ = 607751742024.

The previous prime is 1217171548961. The next prime is 1217171548973. The reversal of 1217171548966 is 6698451717121.

It is a super-2 number, since 2×1217171548966² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1217171548966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217171548961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4204111 + ... + 4484293.

It is an arithmetic number, because the mean of its divisors is an integer number (114266319984).

Almost surely, 2^{1217171548966} is an apocalyptic number.

1217171548966 is a deficient number, since it is larger than the sum of its proper divisors (611089570778).

1217171548966 is a wasteful number, since it uses less digits than its factorization.

1217171548966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283155.

The product of its digits is 5080320, while the sum is 58.

The spelling of 1217171548966 in words is "one trillion, two hundred seventeen billion, one hundred seventy-one million, five hundred forty-eight thousand, nine hundred sixty-six".