7985806849 has 8 divisors (see below), whose sum is σ = 8109466208. Its totient is φ = 7862279040.

The previous prime is 7985806823. The next prime is 7985806859. The reversal of 7985806849 is 9486085897.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7985806849 is a prime.

It is a super-2 number, since 2×7985806849² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7985806819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93169 + ... + 157009.

It is an arithmetic number, because the mean of its divisors is an integer number (1013683276).

Almost surely, 2^7985806849 is an apocalyptic number.

It is an amenable number.

7985806849 is a deficient number, since it is larger than the sum of its proper divisors (123659359).

7985806849 is a wasteful number, since it uses less digits than its factorization.

7985806849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65775.

The product of its (nonzero) digits is 34836480, while the sum is 64.

The square root of 7985806849 is about 89363.3417515258. The cubic root of 7985806849 is about 1998.8165372628.

The spelling of 7985806849 in words is "seven billion, nine hundred eighty-five million, eight hundred six thousand, eight hundred forty-nine".