7647256745 has 8 divisors (see below), whose sum is σ = 9183835080. Its totient is φ = 6113054080.

The previous prime is 7647256741. The next prime is 7647256759. The reversal of 7647256745 is 5476527467.

It can be written as a sum of positive squares in 4 ways, for example, as 2634050329 + 5013206416 = 51323^2 + 70804^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7647256745 - 2² = 7647256741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7647256741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586826 + ... + 599715.

It is an arithmetic number, because the mean of its divisors is an integer number (1147979385).

Almost surely, 2^7647256745 is an apocalyptic number.

It is an amenable number.

7647256745 is a deficient number, since it is larger than the sum of its proper divisors (1536578335).

7647256745 is a wasteful number, since it uses less digits than its factorization.

7647256745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187835.

The product of its digits is 9878400, while the sum is 53.

The square root of 7647256745 is about 87448.5948715015. The cubic root of 7647256745 is about 1970.1617829463.

The spelling of 7647256745 in words is "seven billion, six hundred forty-seven million, two hundred fifty-six thousand, seven hundred forty-five".