7991850881 has 8 divisors (see below), whose sum is σ = 9134892480. Its totient is φ = 6849146448.

The previous prime is 7991850877. The next prime is 7991850899. The reversal of 7991850881 is 1880581997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7991850881 - 2² = 7991850877 is a prime.

It is a super-2 number, since 2×7991850881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7991850821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31271 + ... + 130236.

It is an arithmetic number, because the mean of its divisors is an integer number (1141861560).

Almost surely, 2^7991850881 is an apocalyptic number.

It is an amenable number.

7991850881 is a deficient number, since it is larger than the sum of its proper divisors (1143041599).

7991850881 is a wasteful number, since it uses less digits than its factorization.

7991850881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168583.

The product of its (nonzero) digits is 1451520, while the sum is 56.

The square root of 7991850881 is about 89397.1525329526. The cubic root of 7991850881 is about 1999.3206760356.

The spelling of 7991850881 in words is "seven billion, nine hundred ninety-one million, eight hundred fifty thousand, eight hundred eighty-one".