51494371200 has 288 divisors, whose sum is σ = 185381483040. Its totient is φ = 13609451520.

The previous prime is 51494371147. The next prime is 51494371211. The reversal of 51494371200 is 217349415.

51494371200 is a `hidden beast` number, since 5 + 14 + 9 + 437 + 1 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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 35 ways as a sum of consecutive naturals, for example, 3246489 + ... + 3262311.

It is an arithmetic number, because the mean of its divisors is an integer number (643685705).

Almost surely, 2^51494371200 is an apocalyptic number.

51494371200 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 51494371200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92690741520).

51494371200 is an abundant number, since it is smaller than the sum of its proper divisors (133887111840).

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

51494371200 is a wasteful number, since it uses less digits than its factorization.

51494371200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15966 (or 15946 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 51494371200 in words is "fifty-one billion, four hundred ninety-four million, three hundred seventy-one thousand, two hundred".