1187043779825 has 12 divisors (see below), whose sum is σ = 1472278892748. Its totient is φ = 949412697600.

The previous prime is 1187043779767. The next prime is 1187043779827. The reversal of 1187043779825 is 5289773407811.

It can be written as a sum of positive squares in 6 ways, for example, as 114926424064 + 1072117355761 = 339008^2 + 1035431^2 .

It is not a de Polignac number, because 1187043779825 - 2²⁰ = 1187042731249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187043779827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5449196 + ... + 5662845.

It is an arithmetic number, because the mean of its divisors is an integer number (122689907729).

Almost surely, 2^{1187043779825} is an apocalyptic number.

It is an amenable number.

1187043779825 is a deficient number, since it is larger than the sum of its proper divisors (285235112923).

1187043779825 is a wasteful number, since it uses less digits than its factorization.

1187043779825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116324 (or 11116319 counting only the distinct ones).

The product of its (nonzero) digits is 23708160, while the sum is 62.

The spelling of 1187043779825 in words is "one trillion, one hundred eighty-seven billion, forty-three million, seven hundred seventy-nine thousand, eight hundred twenty-five".