8661265644 has 24 divisors (see below), whose sum is σ = 20216939008. Its totient is φ = 2886042960.

The previous prime is 8661265633. The next prime is 8661265649. The reversal of 8661265644 is 4465621668.

It is a junction number, because it is equal to n+sod(n) for n = 8661265593 and 8661265602.

It is not an unprimeable number, because it can be changed into a prime (8661265649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95812 + ... + 162795.

Almost surely, 2^8661265644 is an apocalyptic number.

It is an amenable number.

8661265644 is an abundant number, since it is smaller than the sum of its proper divisors (11555673364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8661265644 is a wasteful number, since it uses less digits than its factorization.

8661265644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261405 (or 261403 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 48.

The square root of 8661265644 is about 93065.9209592856. The cubic root of 8661265644 is about 2053.6532631610.

The spelling of 8661265644 in words is "eight billion, six hundred sixty-one million, two hundred sixty-five thousand, six hundred forty-four".