7871340864 has 28 divisors (see below), whose sum is σ = 20826256544. Its totient is φ = 2623780224.

The previous prime is 7871340857. The next prime is 7871340871. The reversal of 7871340864 is 4680431787.

It is an interprime number because it is at equal distance from previous prime (7871340857) and next prime (7871340871).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20498092 + ... + 20498475.

Almost surely, 2^7871340864 is an apocalyptic number.

It is an amenable number.

7871340864 is an abundant number, since it is smaller than the sum of its proper divisors (12954915680).

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

7871340864 is a wasteful number, since it uses less digits than its factorization.

7871340864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40996582 (or 40996572 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 7871340864 is about 88720.5774552894. The cubic root of 7871340864 is about 1989.2204099343.

The spelling of 7871340864 in words is "seven billion, eight hundred seventy-one million, three hundred forty thousand, eight hundred sixty-four".