1156042510765 has 4 divisors (see below), whose sum is σ = 1387251012924. Its totient is φ = 924834008608.

The previous prime is 1156042510741. The next prime is 1156042510769. The reversal of 1156042510765 is 5670152406511.

It is a happy number.

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 749647735684 + 406394775081 = 865822^2 + 637491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156042510765 - 2¹⁷ = 1156042379693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156042510769) 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 3 ways as a sum of consecutive naturals, for example, 115604251072 + ... + 115604251081.

It is an arithmetic number, because the mean of its divisors is an integer number (346812753231).

Almost surely, 2^{1156042510765} is an apocalyptic number.

It is an amenable number.

1156042510765 is a deficient number, since it is larger than the sum of its proper divisors (231208502159).

1156042510765 is an equidigital number, since it uses as much as digits as its factorization.

1156042510765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231208502158.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 1156042510765 in words is "one trillion, one hundred fifty-six billion, forty-two million, five hundred ten thousand, seven hundred sixty-five".