51108910388 has 24 divisors (see below), whose sum is σ = 94243134720. Its totient is φ = 24185018880.

The previous prime is 51108910387. The next prime is 51108910423. The reversal of 51108910388 is 88301980115.

It is a happy number.

It is a super-2 number, since 2×51108910388² (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 (51108910387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263981 + ... + 414612.

It is an arithmetic number, because the mean of its divisors is an integer number (3926797280).

Almost surely, 2^51108910388 is an apocalyptic number.

It is an amenable number.

51108910388 is a deficient number, since it is larger than the sum of its proper divisors (43134224332).

51108910388 is a wasteful number, since it uses less digits than its factorization.

51108910388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679607 (or 679605 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 51108910388 in words is "fifty-one billion, one hundred eight million, nine hundred ten thousand, three hundred eighty-eight".