52516721851 has 4 divisors (see below), whose sum is σ = 57290969304. Its totient is φ = 47742474400.

The previous prime is 52516721819. The next prime is 52516721897. The reversal of 52516721851 is 15812761525.

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

It is a cyclic number.

It is not a de Polignac number, because 52516721851 - 2⁵ = 52516721819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52516721798 and 52516721807.

It is not an unprimeable number, because it can be changed into a prime (52516721051) 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, 2387123710 + ... + 2387123731.

It is an arithmetic number, because the mean of its divisors is an integer number (14322742326).

Almost surely, 2^52516721851 is an apocalyptic number.

52516721851 is a deficient number, since it is larger than the sum of its proper divisors (4774247453).

52516721851 is a wasteful number, since it uses less digits than its factorization.

52516721851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774247452.

The product of its digits is 168000, while the sum is 43.

The spelling of 52516721851 in words is "fifty-two billion, five hundred sixteen million, seven hundred twenty-one thousand, eight hundred fifty-one".