52172812817806 has 4 divisors (see below), whose sum is σ = 78259219226712. Its totient is φ = 26086406408902.

The previous prime is 52172812817771. The next prime is 52172812817819. The reversal of 52172812817806 is 60871821827125.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13043203204450 + ... + 13043203204453.

It is an arithmetic number, because the mean of its divisors is an integer number (19564804806678).

Almost surely, 2^{52172812817806} is an apocalyptic number.

52172812817806 is a deficient number, since it is larger than the sum of its proper divisors (26086406408906).

52172812817806 is a wasteful number, since it uses less digits than its factorization.

52172812817806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26086406408905.

The product of its (nonzero) digits is 6021120, while the sum is 58.

The spelling of 52172812817806 in words is "fifty-two trillion, one hundred seventy-two billion, eight hundred twelve million, eight hundred seventeen thousand, eight hundred six".