1187674085765 has 4 divisors (see below), whose sum is σ = 1425208902924. Its totient is φ = 950139268608.

The previous prime is 1187674085743. The next prime is 1187674085779. The reversal of 1187674085765 is 5675804767811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162351779041 + 1025322306724 = 402929^2 + 1012582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187674085765 - 2¹⁸ = 1187673823621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 118767408572 + ... + 118767408581.

It is an arithmetic number, because the mean of its divisors is an integer number (356302225731).

Almost surely, 2^{1187674085765} is an apocalyptic number.

It is an amenable number.

1187674085765 is a deficient number, since it is larger than the sum of its proper divisors (237534817159).

1187674085765 is an equidigital number, since it uses as much as digits as its factorization.

1187674085765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237534817158.

The product of its (nonzero) digits is 79027200, while the sum is 65.

The spelling of 1187674085765 in words is "one trillion, one hundred eighty-seven billion, six hundred seventy-four million, eighty-five thousand, seven hundred sixty-five".