7909778485 has 16 divisors (see below), whose sum is σ = 10849161600. Its totient is φ = 5423115456.

The previous prime is 7909778423. The next prime is 7909778497. The reversal of 7909778485 is 5848779097.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7909778485 - 2¹⁵ = 7909745717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 432711 + ... + 450619.

It is an arithmetic number, because the mean of its divisors is an integer number (678072600).

Almost surely, 2^7909778485 is an apocalyptic number.

It is an amenable number.

7909778485 is a deficient number, since it is larger than the sum of its proper divisors (2939383115).

7909778485 is a wasteful number, since it uses less digits than its factorization.

7909778485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30540.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The square root of 7909778485 is about 88936.9354374210. The cubic root of 7909778485 is about 1992.4530983745.

The spelling of 7909778485 in words is "seven billion, nine hundred nine million, seven hundred seventy-eight thousand, four hundred eighty-five".