7931801856 has 216 divisors, whose sum is σ = 23820465312. Its totient is φ = 2323660800.

The previous prime is 7931801837. The next prime is 7931801863. The reversal of 7931801856 is 6581081397.

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

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 23 ways as a sum of consecutive naturals, for example, 8118040 + ... + 8119016.

It is an arithmetic number, because the mean of its divisors is an integer number (110279932).

Almost surely, 2^7931801856 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 7931801856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11910232656).

7931801856 is an abundant number, since it is smaller than the sum of its proper divisors (15888663456).

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

7931801856 is a wasteful number, since it uses less digits than its factorization.

7931801856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 7931801856 is about 89060.6639094949. The cubic root of 7931801856 is about 1994.3005951534.

The spelling of 7931801856 in words is "seven billion, nine hundred thirty-one million, eight hundred one thousand, eight hundred fifty-six".