51820852103785 has 8 divisors (see below), whose sum is σ = 62240693992776. Its totient is φ = 41419567370880.

The previous prime is 51820852103767. The next prime is 51820852103861. The reversal of 51820852103785 is 58730125802815.

It can be written as a sum of positive squares in 4 ways, for example, as 2450442721321 + 49370409382464 = 1565389^2 + 7026408^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51820852103785 - 2⁵ = 51820852103753 is a prime.

It is a super-2 number, since 2×51820852103785² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4639282876 + ... + 4639294045.

It is an arithmetic number, because the mean of its divisors is an integer number (7780086749097).

Almost surely, 2^{51820852103785} is an apocalyptic number.

It is an amenable number.

51820852103785 is a deficient number, since it is larger than the sum of its proper divisors (10419841888991).

51820852103785 is a wasteful number, since it uses less digits than its factorization.

51820852103785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9278578043.

The product of its (nonzero) digits is 5376000, while the sum is 55.

The spelling of 51820852103785 in words is "fifty-one trillion, eight hundred twenty billion, eight hundred fifty-two million, one hundred three thousand, seven hundred eighty-five".