1186617931645 has 16 divisors (see below), whose sum is σ = 1501149063168. Its totient is φ = 899125729920.

The previous prime is 1186617931591. The next prime is 1186617931649. The reversal of 1186617931645 is 5461397166811.

It is a happy number.

It is not a de Polignac number, because 1186617931645 - 2⁹ = 1186617931133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1186617931645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1186617931649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81435264 + ... + 81449833.

It is an arithmetic number, because the mean of its divisors is an integer number (93821816448).

Almost surely, 2^{1186617931645} is an apocalyptic number.

It is an amenable number.

1186617931645 is a deficient number, since it is larger than the sum of its proper divisors (314531131523).

1186617931645 is a wasteful number, since it uses less digits than its factorization.

1186617931645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162885180.

The product of its digits is 6531840, while the sum is 58.

The spelling of 1186617931645 in words is "one trillion, one hundred eighty-six billion, six hundred seventeen million, nine hundred thirty-one thousand, six hundred forty-five".