5001135923681 has 4 divisors (see below), whose sum is σ = 5001244151700. Its totient is φ = 5001027695664.

The previous prime is 5001135923669. The next prime is 5001135923713. The reversal of 5001135923681 is 1863295311005.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4472484780625 + 528651143056 = 2114825^2 + 727084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5001135923681 is a prime.

It is a super-2 number, since 2×5001135923681² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5001135923621) 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, 54044666 + ... + 54137123.

It is an arithmetic number, because the mean of its divisors is an integer number (1250311037925).

Almost surely, 2^{5001135923681} is an apocalyptic number.

It is an amenable number.

5001135923681 is a deficient number, since it is larger than the sum of its proper divisors (108228019).

5001135923681 is a wasteful number, since it uses less digits than its factorization.

5001135923681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108228018.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 5001135923681 in words is "five trillion, one billion, one hundred thirty-five million, nine hundred twenty-three thousand, six hundred eighty-one".