7759985891 has 12 divisors (see below), whose sum is σ = 9034053120. Its totient is φ = 6646162320.

The previous prime is 7759985887. The next prime is 7759985941. The reversal of 7759985891 is 1985899577.

It is not a de Polignac number, because 7759985891 - 2² = 7759985887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7759985591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 761 + ... + 124581.

It is an arithmetic number, because the mean of its divisors is an integer number (752837760).

Almost surely, 2^7759985891 is an apocalyptic number.

7759985891 is a deficient number, since it is larger than the sum of its proper divisors (1274067229).

7759985891 is a wasteful number, since it uses less digits than its factorization.

7759985891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125114 (or 125107 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 68.

The square root of 7759985891 is about 88090.7821000586. The cubic root of 7759985891 is about 1979.7953986285.

The spelling of 7759985891 in words is "seven billion, seven hundred fifty-nine million, nine hundred eighty-five thousand, eight hundred ninety-one".