7900961856 has 112 divisors (see below), whose sum is σ = 21383573184. Its totient is φ = 2573715456.

The previous prime is 7900961821. The next prime is 7900961879. The reversal of 7900961856 is 6581690097.

It is a junction number, because it is equal to n+sod(n) for n = 7900961799 and 7900961808.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2817351 + ... + 2820153.

Almost surely, 2^7900961856 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 7900961856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10691786592).

7900961856 is an abundant number, since it is smaller than the sum of its proper divisors (13482611328).

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

7900961856 is a wasteful number, since it uses less digits than its factorization.

7900961856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3148 (or 3138 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 7900961856 is about 88887.3548712076. The cubic root of 7900961856 is about 1991.7125276680.

The spelling of 7900961856 in words is "seven billion, nine hundred million, nine hundred sixty-one thousand, eight hundred fifty-six".