7871578533 has 96 divisors (see below), whose sum is σ = 14812412160. Its totient is φ = 3911639040.

The previous prime is 7871578511. The next prime is 7871578537. The reversal of 7871578533 is 3358751787.

It is not a de Polignac number, because 7871578533 - 2⁵ = 7871578501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7871578533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7871578537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3001963 + ... + 3004583.

It is an arithmetic number, because the mean of its divisors is an integer number (154295960).

Almost surely, 2^7871578533 is an apocalyptic number.

It is an amenable number.

7871578533 is a deficient number, since it is larger than the sum of its proper divisors (6940833627).

7871578533 is a wasteful number, since it uses less digits than its factorization.

7871578533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859 (or 2856 counting only the distinct ones).

The product of its digits is 4939200, while the sum is 54.

The square root of 7871578533 is about 88721.9168695086. The cubic root of 7871578533 is about 1989.2404307192.

The spelling of 7871578533 in words is "seven billion, eight hundred seventy-one million, five hundred seventy-eight thousand, five hundred thirty-three".