7981206385 has 32 divisors (see below), whose sum is σ = 9787744512. Its totient is φ = 6246912000.

The previous prime is 7981206341. The next prime is 7981206413. The reversal of 7981206385 is 5836021897.

7981206385 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7981206385 - 2¹³ = 7981198193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23682937 + ... + 23683273.

It is an arithmetic number, because the mean of its divisors is an integer number (305867016).

Almost surely, 2^7981206385 is an apocalyptic number.

It is an amenable number.

7981206385 is a deficient number, since it is larger than the sum of its proper divisors (1806538127).

7981206385 is a wasteful number, since it uses less digits than its factorization.

7981206385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 7981206385 is about 89337.5978242084. The cubic root of 7981206385 is about 1998.4326374248.

The spelling of 7981206385 in words is "seven billion, nine hundred eighty-one million, two hundred six thousand, three hundred eighty-five".