9964975861 has 16 divisors (see below), whose sum is σ = 10342702080. Its totient is φ = 9594549360.

The previous prime is 9964975843. The next prime is 9964975877. The reversal of 9964975861 is 1685794699.

It is a cyclic number.

It is not a de Polignac number, because 9964975861 - 2⁵ = 9964975829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9964975793 and 9964975802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9964975061) 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, 3056050 + ... + 3059308.

It is an arithmetic number, because the mean of its divisors is an integer number (646418880).

Almost surely, 2^9964975861 is an apocalyptic number.

It is an amenable number.

9964975861 is a deficient number, since it is larger than the sum of its proper divisors (377726219).

9964975861 is a wasteful number, since it uses less digits than its factorization.

9964975861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4344.

The product of its digits is 29393280, while the sum is 64.

The square root of 9964975861 is about 99824.7256995981. The cubic root of 9964975861 is about 2151.9165071651.

The spelling of 9964975861 in words is "nine billion, nine hundred sixty-four million, nine hundred seventy-five thousand, eight hundred sixty-one".