51778059984 has 240 divisors, whose sum is σ = 170779819392. Its totient is φ = 14338501632.

The previous prime is 51778059973. The next prime is 51778060003. The reversal of 51778059984 is 48995087715.

51778059984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4428354 + ... + 4440030.

Almost surely, 2^51778059984 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 51778059984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85389909696).

51778059984 is an abundant number, since it is smaller than the sum of its proper divisors (119001759408).

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

51778059984 is a wasteful number, since it uses less digits than its factorization.

51778059984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834 (or 11825 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 63.

The spelling of 51778059984 in words is "fifty-one billion, seven hundred seventy-eight million, fifty-nine thousand, nine hundred eighty-four".