7878500648 has 16 divisors (see below), whose sum is σ = 14880016980. Its totient is φ = 3910496128.

The previous prime is 7878500647. The next prime is 7878500653. The reversal of 7878500648 is 8460058787.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7468762084 + 409738564 = 86422^2 + 20242^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7878500648.

It is not an unprimeable number, because it can be changed into a prime (7878500647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3593111 + ... + 3595302.

Almost surely, 2^7878500648 is an apocalyptic number.

It is an amenable number.

7878500648 is a deficient number, since it is larger than the sum of its proper divisors (7001516332).

7878500648 is a wasteful number, since it uses less digits than its factorization.

7878500648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7188556 (or 7188552 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 53.

The square root of 7878500648 is about 88760.9184720393. The cubic root of 7878500648 is about 1989.8233598252.

The spelling of 7878500648 in words is "seven billion, eight hundred seventy-eight million, five hundred thousand, six hundred forty-eight".