51198389748 has 144 divisors (see below), whose sum is σ = 149845026240. Its totient is φ = 14697840960.

The previous prime is 51198389713. The next prime is 51198389771. The reversal of 51198389748 is 84798389115.

It is a super-2 number, since 2×51198389748² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 882286 + ... + 938522.

It is an arithmetic number, because the mean of its divisors is an integer number (1040590460).

Almost surely, 2^51198389748 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 51198389748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74922513120).

51198389748 is an abundant number, since it is smaller than the sum of its proper divisors (98646636492).

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

51198389748 is a wasteful number, since it uses less digits than its factorization.

51198389748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56299 (or 56272 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The spelling of 51198389748 in words is "fifty-one billion, one hundred ninety-eight million, three hundred eighty-nine thousand, seven hundred forty-eight".