8945648641 has 4 divisors (see below), whose sum is σ = 9234217984. Its totient is φ = 8657079300.

The previous prime is 8945648633. The next prime is 8945648653. The reversal of 8945648641 is 1468465498.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8945648641 - 2³ = 8945648633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8945648141) 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, 144284625 + ... + 144284686.

It is an arithmetic number, because the mean of its divisors is an integer number (2308554496).

Almost surely, 2^8945648641 is an apocalyptic number.

It is an amenable number.

8945648641 is a deficient number, since it is larger than the sum of its proper divisors (288569343).

8945648641 is a wasteful number, since it uses less digits than its factorization.

8945648641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288569342.

The product of its digits is 6635520, while the sum is 55.

The square root of 8945648641 is about 94581.4391992425. The cubic root of 8945648641 is about 2075.8881293024. Note that the first 3 decimals are identical.

The spelling of 8945648641 in words is "eight billion, nine hundred forty-five million, six hundred forty-eight thousand, six hundred forty-one".