1181008511766 has 12 divisors (see below), whose sum is σ = 2558851775532. Its totient is φ = 393669503916.

The previous prime is 1181008511729. The next prime is 1181008511783. The reversal of 1181008511766 is 6671158001811.

1181008511766 is a `hidden beast` number, since 118 + 10 + 0 + 8 + 511 + 7 + 6 + 6 = 666.

It is a super-2 number, since 2×1181008511766² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32805791976 + ... + 32805792011.

It is an arithmetic number, because the mean of its divisors is an integer number (213237647961).

Almost surely, 2^{1181008511766} is an apocalyptic number.

1181008511766 is an abundant number, since it is smaller than the sum of its proper divisors (1377843263766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1181008511766 is a wasteful number, since it uses less digits than its factorization.

1181008511766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65611583995 (or 65611583992 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 45.

The spelling of 1181008511766 in words is "one trillion, one hundred eighty-one billion, eight million, five hundred eleven thousand, seven hundred sixty-six".