1155991264108 has 36 divisors (see below), whose sum is σ = 2149476562240. Its totient is φ = 543871141632.

The previous prime is 1155991264081. The next prime is 1155991264133. The reversal of 1155991264108 is 8014621995511.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5028298 + ... + 5253166.

Almost surely, 2^{1155991264108} is an apocalyptic number.

It is an amenable number.

1155991264108 is a deficient number, since it is larger than the sum of its proper divisors (993485298132).

1155991264108 is a wasteful number, since it uses less digits than its factorization.

1155991264108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229354 (or 229335 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 52.

The spelling of 1155991264108 in words is "one trillion, one hundred fifty-five billion, nine hundred ninety-one million, two hundred sixty-four thousand, one hundred eight".