1219287366166 has 16 divisors (see below), whose sum is σ = 1860658752960. Its totient is φ = 599111215560.

The previous prime is 1219287366161. The next prime is 1219287366197. The reversal of 1219287366166 is 6616637829121.

It is a self number, because there is not a number n which added to its sum of digits gives 1219287366166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219287366161) 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, 10802040 + ... + 10914331.

It is an arithmetic number, because the mean of its divisors is an integer number (116291172060).

Almost surely, 2^{1219287366166} is an apocalyptic number.

1219287366166 is a deficient number, since it is larger than the sum of its proper divisors (641371386794).

1219287366166 is a wasteful number, since it uses less digits than its factorization.

1219287366166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21716859.

The product of its digits is 7838208, while the sum is 58.

The spelling of 1219287366166 in words is "one trillion, two hundred nineteen billion, two hundred eighty-seven million, three hundred sixty-six thousand, one hundred sixty-six".