7981859564832 has 144 divisors (see below), whose sum is σ = 22203012873888. Its totient is φ = 2510077363200.

The previous prime is 7981859564813. The next prime is 7981859564863. The reversal of 7981859564832 is 2384659581897.

It is a super-2 number, since 2×7981859564832² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2630707 + ... + 4783757.

It is an arithmetic number, because the mean of its divisors is an integer number (154187589402).

Almost surely, 2^{7981859564832} 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 7981859564832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11101506436944).

7981859564832 is an abundant number, since it is smaller than the sum of its proper divisors (14221153309056).

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

7981859564832 is a wasteful number, since it uses less digits than its factorization.

7981859564832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153183 (or 2153152 counting only the distinct ones).

The product of its digits is 1045094400, while the sum is 75.

The spelling of 7981859564832 in words is "seven trillion, nine hundred eighty-one billion, eight hundred fifty-nine million, five hundred sixty-four thousand, eight hundred thirty-two".