51805698048 has 216 divisors, whose sum is σ = 162029027160. Its totient is φ = 15939256320.

The previous prime is 51805698047. The next prime is 51805698089. The reversal of 51805698048 is 84089650815.

It is a happy number.

51805698048 is a `hidden beast` number, since 518 + 0 + 5 + 6 + 9 + 80 + 48 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51805697985 and 51805698003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51805698047) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3106693 + ... + 3123323.

It is an arithmetic number, because the mean of its divisors is an integer number (750134385).

Almost surely, 2^51805698048 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 51805698048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81014513580).

51805698048 is an abundant number, since it is smaller than the sum of its proper divisors (110223329112).

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

51805698048 is a wasteful number, since it uses less digits than its factorization.

51805698048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16685 (or 16649 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 51805698048 in words is "fifty-one billion, eight hundred five million, six hundred ninety-eight thousand, forty-eight".