7143641856 has 288 divisors, whose sum is σ = 22993528320. Its totient is φ = 2174570496.

The previous prime is 7143641839. The next prime is 7143641959. The reversal of 7143641856 is 6581463417.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9614221 + ... + 9614963.

It is an arithmetic number, because the mean of its divisors is an integer number (79838640).

Almost surely, 2^7143641856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7143641856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11496764160).

7143641856 is an abundant number, since it is smaller than the sum of its proper divisors (15849886464).

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

7143641856 is a wasteful number, since it uses less digits than its factorization.

7143641856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888 (or 868 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 7143641856 is about 84520.0677709146. The cubic root of 7143641856 is about 1925.9273077445.

The spelling of 7143641856 in words is "seven billion, one hundred forty-three million, six hundred forty-one thousand, eight hundred fifty-six".