51103607508 has 96 divisors (see below), whose sum is σ = 136991232000. Its totient is φ = 16457735520.

The previous prime is 51103607447. The next prime is 51103607509. The reversal of 51103607508 is 80570630115.

51103607508 is a `hidden beast` number, since 5 + 110 + 36 + 0 + 7 + 508 = 666.

It is a super-2 number, since 2×51103607508² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51103607509) 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 31 ways as a sum of consecutive naturals, for example, 2060083 + ... + 2084741.

It is an arithmetic number, because the mean of its divisors is an integer number (1426992000).

Almost surely, 2^51103607508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51103607508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68495616000).

51103607508 is an abundant number, since it is smaller than the sum of its proper divisors (85887624492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51103607508 is a wasteful number, since it uses less digits than its factorization.

51103607508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25322 (or 25314 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 51103607508 in words is "fifty-one billion, one hundred three million, six hundred seven thousand, five hundred eight".