51794211840 has 704 divisors, whose sum is σ = 197376652800. Its totient is φ = 11348213760.

The previous prime is 51794211839. The next prime is 51794211883. The reversal of 51794211840 is 4811249715.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 51794211792 and 51794211801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 347612086 + ... + 347612234.

Almost surely, 2^51794211840 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 51794211840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98688326400).

51794211840 is an abundant number, since it is smaller than the sum of its proper divisors (145582440960).

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

51794211840 is a wasteful number, since it uses less digits than its factorization.

51794211840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 51794211840 in words is "fifty-one billion, seven hundred ninety-four million, two hundred eleven thousand, eight hundred forty".