9977959685 has 16 divisors (see below), whose sum is σ = 12800975616. Its totient is φ = 7439870208.

The previous prime is 9977959681. The next prime is 9977959697. The reversal of 9977959685 is 5869597799.

It is not a de Polignac number, because 9977959685 - 2² = 9977959681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9977959681) 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, 561089 + ... + 578598.

It is an arithmetic number, because the mean of its divisors is an integer number (800060976).

Almost surely, 2^9977959685 is an apocalyptic number.

It is an amenable number.

9977959685 is a deficient number, since it is larger than the sum of its proper divisors (2823015931).

9977959685 is a wasteful number, since it uses less digits than its factorization.

9977959685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139812.

The product of its digits is 385786800, while the sum is 74.

The square root of 9977959685 is about 99889.7376360555. The cubic root of 9977959685 is about 2152.8507117748.

The spelling of 9977959685 in words is "nine billion, nine hundred seventy-seven million, nine hundred fifty-nine thousand, six hundred eighty-five".