1187727278805 has 64 divisors (see below), whose sum is σ = 2168941017600. Its totient is φ = 616232448000.

The previous prime is 1187727278767. The next prime is 1187727278809. The reversal of 1187727278805 is 5088727277811.

It is not a de Polignac number, because 1187727278805 - 2¹⁶ = 1187727213269 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187727278809) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 37391680 + ... + 37423430.

It is an arithmetic number, because the mean of its divisors is an integer number (33889703400).

Almost surely, 2^{1187727278805} is an apocalyptic number.

1187727278805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1187727278805 is a deficient number, since it is larger than the sum of its proper divisors (981213738795).

1187727278805 is a wasteful number, since it uses less digits than its factorization.

1187727278805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39291 (or 39285 counting only the distinct ones).

The product of its (nonzero) digits is 24586240, while the sum is 63.

The spelling of 1187727278805 in words is "one trillion, one hundred eighty-seven billion, seven hundred twenty-seven million, two hundred seventy-eight thousand, eight hundred five".