8663529641 has 24 divisors (see below), whose sum is σ = 9668865024. Its totient is φ = 7754298240.

The previous prime is 8663529631. The next prime is 8663529689. The reversal of 8663529641 is 1469253668.

It is not a de Polignac number, because 8663529641 - 2¹⁰ = 8663528617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8663529641.

It is not an unprimeable number, because it can be changed into a prime (8663529631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1153400 + ... + 1160886.

It is an arithmetic number, because the mean of its divisors is an integer number (402869376).

Almost surely, 2^8663529641 is an apocalyptic number.

It is an amenable number.

8663529641 is a deficient number, since it is larger than the sum of its proper divisors (1005335383).

8663529641 is a wasteful number, since it uses less digits than its factorization.

8663529641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721 (or 7708 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 8663529641 is about 93078.0835696567. The cubic root of 8663529641 is about 2053.8321846552.

The spelling of 8663529641 in words is "eight billion, six hundred sixty-three million, five hundred twenty-nine thousand, six hundred forty-one".