7871578532 has 12 divisors (see below), whose sum is σ = 13782974940. Its totient is φ = 3933585696.

The previous prime is 7871578511. The next prime is 7871578537. The reversal of 7871578532 is 2358751787.

It can be written as a sum of positive squares in 2 ways, for example, as 6072461476 + 1799117056 = 77926^2 + 42416^2 .

It is not an unprimeable number, because it can be changed into a prime (7871578537) 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, 542843 + ... + 557154.

It is an arithmetic number, because the mean of its divisors is an integer number (1148581245).

Almost surely, 2^7871578532 is an apocalyptic number.

It is an amenable number.

7871578532 is a deficient number, since it is larger than the sum of its proper divisors (5911396408).

7871578532 is a wasteful number, since it uses less digits than its factorization.

7871578532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101790 (or 1101788 counting only the distinct ones).

The product of its digits is 3292800, while the sum is 53.

The square root of 7871578532 is about 88721.9168638730. The cubic root of 7871578532 is about 1989.2404306350.

The spelling of 7871578532 in words is "seven billion, eight hundred seventy-one million, five hundred seventy-eight thousand, five hundred thirty-two".