1187668816 has 20 divisors (see below), whose sum is σ = 2302016724. Its totient is φ = 593600000.

The previous prime is 1187668789. The next prime is 1187668817. The reversal of 1187668816 is 6188667811.

It can be written as a sum of positive squares in 2 ways, for example, as 506250000 + 681418816 = 22500^2 + 26104^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187668817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31566 + ... + 58066.

Almost surely, 2^1187668816 is an apocalyptic number.

1187668816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1187668816 is a deficient number, since it is larger than the sum of its proper divisors (1114347908).

1187668816 is a wasteful number, since it uses less digits than its factorization.

1187668816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29310 (or 29304 counting only the distinct ones).

The product of its digits is 774144, while the sum is 52.

The square root of 1187668816 is about 34462.5712331509. The cubic root of 1187668816 is about 1059.0060743733.

The spelling of 1187668816 in words is "one billion, one hundred eighty-seven million, six hundred sixty-eight thousand, eight hundred sixteen".