8378233425 has 18 divisors (see below), whose sum is σ = 15006347382. Its totient is φ = 4468391040.

The previous prime is 8378233421. The next prime is 8378233427. The reversal of 8378233425 is 5243328738.

8378233425 is a `hidden beast` number, since 8 + 378 + 233 + 42 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 550230849 + 7828002576 = 23457^2 + 88476^2 .

It is not a de Polignac number, because 8378233425 - 2² = 8378233421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (8378233421) 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 17 ways as a sum of consecutive naturals, for example, 18618072 + ... + 18618521.

Almost surely, 2^8378233425 is an apocalyptic number.

It is an amenable number.

8378233425 is a deficient number, since it is larger than the sum of its proper divisors (6628113957).

8378233425 is a wasteful number, since it uses less digits than its factorization.

8378233425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37236609 (or 37236601 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 8378233425 is about 91532.6904717653. The cubic root of 8378233425 is about 2031.0353640822.

The spelling of 8378233425 in words is "eight billion, three hundred seventy-eight million, two hundred thirty-three thousand, four hundred twenty-five".