7797616985 has 16 divisors (see below), whose sum is σ = 9614990736. Its totient is φ = 6066367488.

The previous prime is 7797616969. The next prime is 7797616987. The reversal of 7797616985 is 5896167977.

It can be written as a sum of positive squares in 8 ways, for example, as 248787529 + 7548829456 = 15773^2 + 86884^2 .

It is a cyclic number.

It is not a de Polignac number, because 7797616985 - 2⁴ = 7797616969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7797616987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388517 + ... + 408093.

It is an arithmetic number, because the mean of its divisors is an integer number (600936921).

Almost surely, 2^7797616985 is an apocalyptic number.

It is an amenable number.

7797616985 is a deficient number, since it is larger than the sum of its proper divisors (1817373751).

7797616985 is a wasteful number, since it uses less digits than its factorization.

7797616985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21772.

The product of its digits is 40007520, while the sum is 65.

The square root of 7797616985 is about 88304.1164669009. The cubic root of 7797616985 is about 1982.9904972619.

The spelling of 7797616985 in words is "seven billion, seven hundred ninety-seven million, six hundred sixteen thousand, nine hundred eighty-five".