51894440803 has 4 divisors (see below), whose sum is σ = 51960381160. Its totient is φ = 51828500448.

The previous prime is 51894440797. The next prime is 51894440887. The reversal of 51894440803 is 30804449815.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51894440803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51894441803) 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, 32968998 + ... + 32970571.

It is an arithmetic number, because the mean of its divisors is an integer number (12990095290).

Almost surely, 2^51894440803 is an apocalyptic number.

51894440803 is a deficient number, since it is larger than the sum of its proper divisors (65940357).

51894440803 is an equidigital number, since it uses as much as digits as its factorization.

51894440803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65940356.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 51894440803 in words is "fifty-one billion, eight hundred ninety-four million, four hundred forty thousand, eight hundred three".