1187775065806 has 16 divisors (see below), whose sum is σ = 2155961464416. Its totient is φ = 479102547456.

The previous prime is 1187775065801. The next prime is 1187775065881. The reversal of 1187775065806 is 6085605777811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187775065801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2495325531 + ... + 2495326006.

It is an arithmetic number, because the mean of its divisors is an integer number (134747591526).

Almost surely, 2^{1187775065806} is an apocalyptic number.

1187775065806 is a deficient number, since it is larger than the sum of its proper divisors (968186398610).

1187775065806 is a wasteful number, since it uses less digits than its factorization.

1187775065806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990651563.

The product of its (nonzero) digits is 19756800, while the sum is 61.

The spelling of 1187775065806 in words is "one trillion, one hundred eighty-seven billion, seven hundred seventy-five million, sixty-five thousand, eight hundred six".