7615878361 has 45 divisors (see below), whose sum is σ = 9691406781. Its totient is φ = 5981766336.

The previous prime is 7615878353. The next prime is 7615878367. The reversal of 7615878361 is 1638785167.

The square root of 7615878361 is 87269.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 676988361 + 6938890000 = 26019^2 + 83300^2 .

It is not a de Polignac number, because 7615878361 - 2³ = 7615878353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7615878299 and 7615878308.

It is not an unprimeable number, because it can be changed into a prime (7615878367) 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 44 ways as a sum of consecutive naturals, for example, 55590285 + ... + 55590421.

Almost surely, 2^7615878361 is an apocalyptic number.

7615878361 is the 87269-th square number.

7615878361 is the 43635-th centered octagonal number.

It is an amenable number.

7615878361 is a deficient number, since it is larger than the sum of its proper divisors (2075528420).

7615878361 is an frugal number, since it uses more digits than its factorization.

7615878361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 157 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The cubic root of 7615878361 is about 1967.4634192198.

The spelling of 7615878361 in words is "seven billion, six hundred fifteen million, eight hundred seventy-eight thousand, three hundred sixty-one".