7875811287 has 12 divisors (see below), whose sum is σ = 11407865040. Its totient is φ = 5235913248.

The previous prime is 7875811283. The next prime is 7875811309. The reversal of 7875811287 is 7821185787.

It is not a de Polignac number, because 7875811287 - 2² = 7875811283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7875811283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1215558 + ... + 1222019.

It is an arithmetic number, because the mean of its divisors is an integer number (950655420).

Almost surely, 2^7875811287 is an apocalyptic number.

7875811287 is a deficient number, since it is larger than the sum of its proper divisors (3532053753).

7875811287 is a wasteful number, since it uses less digits than its factorization.

7875811287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437942 (or 2437939 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 54.

The square root of 7875811287 is about 88745.7677131704. The cubic root of 7875811287 is about 1989.5969223934.

The spelling of 7875811287 in words is "seven billion, eight hundred seventy-five million, eight hundred eleven thousand, two hundred eighty-seven".