8415634543641 has 20 divisors (see below), whose sum is σ = 13538542183012. Its totient is φ = 5178852026208.

The previous prime is 8415634543619. The next prime is 8415634543703. The reversal of 8415634543641 is 1463454365148.

8415634543641 is a `hidden beast` number, since 8 + 4 + 1 + 5 + 6 + 34 + 543 + 64 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3196214537616 + 5219420006025 = 1787796^2 + 2284605^2 .

It is not a de Polignac number, because 8415634543641 - 2²¹ = 8415632446489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8415634543741) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3996026746 + ... + 3996028851.

Almost surely, 2^{8415634543641} is an apocalyptic number.

8415634543641 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8415634543641 is a deficient number, since it is larger than the sum of its proper divisors (5122907639371).

8415634543641 is a wasteful number, since it uses less digits than its factorization.

8415634543641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7992055622 (or 7992055613 counting only the distinct ones).

The product of its digits is 16588800, while the sum is 54.

The spelling of 8415634543641 in words is "eight trillion, four hundred fifteen billion, six hundred thirty-four million, five hundred forty-three thousand, six hundred forty-one".