51779943124 has 72 divisors (see below), whose sum is σ = 113813222208. Its totient is φ = 20178512640.

The previous prime is 51779943121. The next prime is 51779943133. The reversal of 51779943124 is 42134997715.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51779943121) 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 23 ways as a sum of consecutive naturals, for example, 235384 + ... + 398704.

Almost surely, 2^51779943124 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 51779943124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56906611104).

51779943124 is an abundant number, since it is smaller than the sum of its proper divisors (62033279084).

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

51779943124 is a wasteful number, since it uses less digits than its factorization.

51779943124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163425 (or 163410 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The spelling of 51779943124 in words is "fifty-one billion, seven hundred seventy-nine million, nine hundred forty-three thousand, one hundred twenty-four".