8549572961 has 4 divisors (see below), whose sum is σ = 8562507924. Its totient is φ = 8536638000.

The previous prime is 8549572951. The next prime is 8549572963. The reversal of 8549572961 is 1692759458.

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 2747856400 + 5801716561 = 52420^2 + 76169^2 .

It is a cyclic number.

It is not a de Polignac number, because 8549572961 - 2⁶ = 8549572897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8549572897 and 8549572906.

It is not an unprimeable number, because it can be changed into a prime (8549572963) 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, 6466490 + ... + 6467811.

It is an arithmetic number, because the mean of its divisors is an integer number (2140626981).

Almost surely, 2^8549572961 is an apocalyptic number.

It is an amenable number.

8549572961 is a deficient number, since it is larger than the sum of its proper divisors (12934963).

8549572961 is a wasteful number, since it uses less digits than its factorization.

8549572961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12934962.

The product of its digits is 5443200, while the sum is 56.

The square root of 8549572961 is about 92463.9008532519. The cubic root of 8549572961 is about 2044.7873086584.

The spelling of 8549572961 in words is "eight billion, five hundred forty-nine million, five hundred seventy-two thousand, nine hundred sixty-one".