1181555400968 has 16 divisors (see below), whose sum is σ = 2222405076780. Its totient is φ = 588914047168.

The previous prime is 1181555400953. The next prime is 1181555400979. The reversal of 1181555400968 is 8690045551811.

It can be written as a sum of positive squares in 2 ways, for example, as 1118894297284 + 62661103684 = 1057778^2 + 250322^2 .

It is an unprimeable number.

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, 232953971 + ... + 232959042.

Almost surely, 2^{1181555400968} is an apocalyptic number.

It is an amenable number.

1181555400968 is a deficient number, since it is larger than the sum of its proper divisors (1040849675812).

1181555400968 is a wasteful number, since it uses less digits than its factorization.

1181555400968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465913336 (or 465913332 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 53.

The spelling of 1181555400968 in words is "one trillion, one hundred eighty-one billion, five hundred fifty-five million, four hundred thousand, nine hundred sixty-eight".