7985208851 has 2 divisors, whose sum is σ = 7985208852. Its totient is φ = 7985208850.

The previous prime is 7985208823. The next prime is 7985208887. The reversal of 7985208851 is 1588025897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7985208851 - 2³⁰ = 6911467027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7985208793 and 7985208802.

It is not a weakly prime, because it can be changed into another prime (7985208251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992604425 + 3992604426.

It is an arithmetic number, because the mean of its divisors is an integer number (3992604426).

Almost surely, 2^7985208851 is an apocalyptic number.

7985208851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7985208851 is an equidigital number, since it uses as much as digits as its factorization.

7985208851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 53.

The square root of 7985208851 is about 89359.9958090867. The cubic root of 7985208851 is about 1998.7666438226.

The spelling of 7985208851 in words is "seven billion, nine hundred eighty-five million, two hundred eight thousand, eight hundred fifty-one".