8913643641 has 48 divisors (see below), whose sum is σ = 15519853440. Its totient is φ = 4815832320.

The previous prime is 8913643631. The next prime is 8913643657. The reversal of 8913643641 is 1463463198.

8913643641 is a `hidden beast` number, since 89 + 136 + 436 + 4 + 1 = 666.

It is not a de Polignac number, because 8913643641 - 2¹⁹ = 8913119353 is a prime.

It is a super-3 number, since 3×8913643641³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8913643631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 616491 + ... + 630783.

It is an arithmetic number, because the mean of its divisors is an integer number (323330280).

Almost surely, 2^8913643641 is an apocalyptic number.

It is an amenable number.

8913643641 is a deficient number, since it is larger than the sum of its proper divisors (6606209799).

8913643641 is a wasteful number, since it uses less digits than its factorization.

8913643641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14846 (or 14843 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 8913643641 is about 94412.0947813361. The cubic root of 8913643641 is about 2073.4095242217.

The spelling of 8913643641 in words is "eight billion, nine hundred thirteen million, six hundred forty-three thousand, six hundred forty-one".