51309936000 has 896 divisors, whose sum is σ = 197223193440. Its totient is φ = 13262745600.

The previous prime is 51309935981. The next prime is 51309936077. The reversal of 51309936000 is 63990315.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 618191959 + ... + 618192041.

Almost surely, 2^51309936000 is an apocalyptic number.

51309936000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51309936000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98611596720).

51309936000 is an abundant number, since it is smaller than the sum of its proper divisors (145913257440).

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

51309936000 is an frugal number, since it uses more digits than its factorization.

51309936000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 36.

The spelling of 51309936000 in words is "fifty-one billion, three hundred nine million, nine hundred thirty-six thousand".