1218631132766 has 4 divisors (see below), whose sum is σ = 1827946699152. Its totient is φ = 609315566382.

The previous prime is 1218631132759. The next prime is 1218631132783. The reversal of 1218631132766 is 6672311368121.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1218631132766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304657783190 + ... + 304657783193.

It is an arithmetic number, because the mean of its divisors is an integer number (456986674788).

Almost surely, 2^{1218631132766} is an apocalyptic number.

1218631132766 is a deficient number, since it is larger than the sum of its proper divisors (609315566386).

1218631132766 is an equidigital number, since it uses as much as digits as its factorization.

1218631132766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609315566385.

The product of its digits is 435456, while the sum is 47.

The spelling of 1218631132766 in words is "one trillion, two hundred eighteen billion, six hundred thirty-one million, one hundred thirty-two thousand, seven hundred sixty-six".