8961680505 has 64 divisors (see below), whose sum is σ = 15255936000. Its totient is φ = 4479535872.

The previous prime is 8961680503. The next prime is 8961680513. The reversal of 8961680505 is 5050861698.

It is not a de Polignac number, because 8961680505 - 2¹ = 8961680503 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8961680503) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17606191 + ... + 17606699.

It is an arithmetic number, because the mean of its divisors is an integer number (238374000).

Almost surely, 2^8961680505 is an apocalyptic number.

It is an amenable number.

8961680505 is a deficient number, since it is larger than the sum of its proper divisors (6294255495).

8961680505 is a wasteful number, since it uses less digits than its factorization.

8961680505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 8961680505 is about 94666.1529006012. The cubic root of 8961680505 is about 2077.1274839967.

The spelling of 8961680505 in words is "eight billion, nine hundred sixty-one million, six hundred eighty thousand, five hundred five".