51903725318 has 4 divisors (see below), whose sum is σ = 77855587980. Its totient is φ = 25951862658.

The previous prime is 51903725317. The next prime is 51903725329. The reversal of 51903725318 is 81352730915.

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

It is a super-2 number, since 2×51903725318² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51903725311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12975931328 + ... + 12975931331.

It is an arithmetic number, because the mean of its divisors is an integer number (19463896995).

Almost surely, 2^51903725318 is an apocalyptic number.

51903725318 is a deficient number, since it is larger than the sum of its proper divisors (25951862662).

51903725318 is a wasteful number, since it uses less digits than its factorization.

51903725318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25951862661.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 51903725318 in words is "fifty-one billion, nine hundred three million, seven hundred twenty-five thousand, three hundred eighteen".