7872365245 has 4 divisors (see below), whose sum is σ = 9446838300. Its totient is φ = 6297892192.

The previous prime is 7872365243. The next prime is 7872365279. The reversal of 7872365245 is 5425632787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5425632787 = 41 ⋅132332507.

It can be written as a sum of positive squares in 2 ways, for example, as 889590276 + 6982774969 = 29826^2 + 83563^2 .

It is a cyclic number.

It is not a de Polignac number, because 7872365245 - 2¹ = 7872365243 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7872365243) 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 3 ways as a sum of consecutive naturals, for example, 787236520 + ... + 787236529.

It is an arithmetic number, because the mean of its divisors is an integer number (2361709575).

Almost surely, 2^7872365245 is an apocalyptic number.

It is an amenable number.

7872365245 is a deficient number, since it is larger than the sum of its proper divisors (1574473055).

7872365245 is a wasteful number, since it uses less digits than its factorization.

7872365245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574473054.

The product of its digits is 2822400, while the sum is 49.

The square root of 7872365245 is about 88726.3503419362. The cubic root of 7872365245 is about 1989.3066989685.

The spelling of 7872365245 in words is "seven billion, eight hundred seventy-two million, three hundred sixty-five thousand, two hundred forty-five".