8961577385 has 4 divisors (see below), whose sum is σ = 10753892868. Its totient is φ = 7169261904.

The previous prime is 8961577381. The next prime is 8961577397. The reversal of 8961577385 is 5837751698.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4937451289 + 4024126096 = 70267^2 + 63436^2 .

It is a cyclic number.

It is not a de Polignac number, because 8961577385 - 2² = 8961577381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8961577381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896157734 + ... + 896157743.

It is an arithmetic number, because the mean of its divisors is an integer number (2688473217).

Almost surely, 2^8961577385 is an apocalyptic number.

It is an amenable number.

8961577385 is a deficient number, since it is larger than the sum of its proper divisors (1792315483).

8961577385 is a wasteful number, since it uses less digits than its factorization.

8961577385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792315482.

The product of its digits is 12700800, while the sum is 59.

The square root of 8961577385 is about 94665.6082481912. The cubic root of 8961577385 is about 2077.1195169564.

The spelling of 8961577385 in words is "eight billion, nine hundred sixty-one million, five hundred seventy-seven thousand, three hundred eighty-five".