7878136970 has 24 divisors (see below), whose sum is σ = 15586994052. Its totient is φ = 2864776640.

The previous prime is 7878136969. The next prime is 7878136999. The reversal of 7878136970 is 796318787.

It can be written as a sum of positive squares in 2 ways, for example, as 7291964449 + 586172521 = 85393^2 + 24211^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3254219 + ... + 3256638.

Almost surely, 2^7878136970 is an apocalyptic number.

7878136970 is a deficient number, since it is larger than the sum of its proper divisors (7708857082).

7878136970 is a wasteful number, since it uses less digits than its factorization.

7878136970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6510886 (or 6510875 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 7878136970 is about 88758.8698102899. The cubic root of 7878136970 is about 1989.7927420656.

The spelling of 7878136970 in words is "seven billion, eight hundred seventy-eight million, one hundred thirty-six thousand, nine hundred seventy".