5001857621 has 4 divisors (see below), whose sum is σ = 5174335500. Its totient is φ = 4829379744.

The previous prime is 5001857599. The next prime is 5001857639. The reversal of 5001857621 is 1267581005.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1267581005 = 5 ⋅253516201.

It can be written as a sum of positive squares in 2 ways, for example, as 1452676996 + 3549180625 = 38114^2 + 59575^2 .

It is not a de Polignac number, because 5001857621 - 2¹⁰ = 5001856597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5001857221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86238896 + ... + 86238953.

It is an arithmetic number, because the mean of its divisors is an integer number (1293583875).

Almost surely, 2^5001857621 is an apocalyptic number.

It is an amenable number.

5001857621 is a deficient number, since it is larger than the sum of its proper divisors (172477879).

5001857621 is a wasteful number, since it uses less digits than its factorization.

5001857621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172477878.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 5001857621 is about 70723.8122629147. The cubic root of 5001857621 is about 1710.1876862719.

The spelling of 5001857621 in words is "five billion, one million, eight hundred fifty-seven thousand, six hundred twenty-one".