1156111660611 has 8 divisors (see below), whose sum is σ = 1712758015760. Its totient is φ = 770741107056.

The previous prime is 1156111660549. The next prime is 1156111660631. The reversal of 1156111660611 is 1160661116511.

It is a happy number.

1156111660611 is a `hidden beast` number, since 1 + 15 + 6 + 11 + 16 + 6 + 0 + 611 = 666.

It is not a de Polignac number, because 1156111660611 - 2⁶ = 1156111660547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1156111660631) 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 7 ways as a sum of consecutive naturals, for example, 21409475170 + ... + 21409475223.

It is an arithmetic number, because the mean of its divisors is an integer number (214094751970).

Almost surely, 2^{1156111660611} is an apocalyptic number.

1156111660611 is a deficient number, since it is larger than the sum of its proper divisors (556646355149).

1156111660611 is an equidigital number, since it uses as much as digits as its factorization.

1156111660611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42818950402 (or 42818950396 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 1156111660611 in words is "one trillion, one hundred fifty-six billion, one hundred eleven million, six hundred sixty thousand, six hundred eleven".