51903344638 has 8 divisors (see below), whose sum is σ = 77859851832. Its totient is φ = 25950060696.

The previous prime is 51903344627. The next prime is 51903344707. The reversal of 51903344638 is 83644330915.

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

It is a super-2 number, since 2×51903344638² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765145 + ... + 830212.

It is an arithmetic number, because the mean of its divisors is an integer number (9732481479).

Almost surely, 2^51903344638 is an apocalyptic number.

51903344638 is a deficient number, since it is larger than the sum of its proper divisors (25956507194).

51903344638 is a wasteful number, since it uses less digits than its factorization.

51903344638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611626.

The product of its (nonzero) digits is 933120, while the sum is 46.

The spelling of 51903344638 in words is "fifty-one billion, nine hundred three million, three hundred forty-four thousand, six hundred thirty-eight".