7875778976 has 24 divisors (see below), whose sum is σ = 16698166884. Its totient is φ = 3634974720.

The previous prime is 7875778957. The next prime is 7875779003. The reversal of 7875778976 is 6798775787.

It can be written as a sum of positive squares in 2 ways, for example, as 6872410000 + 1003368976 = 82900^2 + 31676^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9465665 + ... + 9466496.

Almost surely, 2^7875778976 is an apocalyptic number.

It is an amenable number.

7875778976 is an abundant number, since it is smaller than the sum of its proper divisors (8822387908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7875778976 is a wasteful number, since it uses less digits than its factorization.

7875778976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18932184 (or 18932176 counting only the distinct ones).

The product of its digits is 290424960, while the sum is 71.

The square root of 7875778976 is about 88745.5856704997. The cubic root of 7875778976 is about 1989.5942015751.

The spelling of 7875778976 in words is "seven billion, eight hundred seventy-five million, seven hundred seventy-eight thousand, nine hundred seventy-six".