2745947115785 has 4 divisors (see below), whose sum is σ = 3295136538948. Its totient is φ = 2196757692624.

The previous prime is 2745947115763. The next prime is 2745947115797. The reversal of 2745947115785 is 5875117495472.

2745947115785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 895269838969 + 1850677276816 = 946187^2 + 1360396^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745947115785 - 2⁶ = 2745947115721 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274594711574 + ... + 274594711583.

It is an arithmetic number, because the mean of its divisors is an integer number (823784134737).

Almost surely, 2^{2745947115785} is an apocalyptic number.

It is an amenable number.

2745947115785 is a deficient number, since it is larger than the sum of its proper divisors (549189423163).

2745947115785 is an equidigital number, since it uses as much as digits as its factorization.

2745947115785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549189423162.

The product of its digits is 98784000, while the sum is 65.

The spelling of 2745947115785 in words is "two trillion, seven hundred forty-five billion, nine hundred forty-seven million, one hundred fifteen thousand, seven hundred eighty-five".