51256336000 has 128 divisors (see below), whose sum is σ = 127920546000. Its totient is φ = 20424601600.

The previous prime is 51256335953. The next prime is 51256336003. The reversal of 51256336000 is 63365215.

It can be written as a sum of positive squares in 8 ways, for example, as 1405950016 + 49850385984 = 37496^2 + 223272^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (51256336003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4298046 + ... + 4309954.

Almost surely, 2^51256336000 is an apocalyptic number.

51256336000 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 51256336000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63960273000).

51256336000 is an abundant number, since it is smaller than the sum of its proper divisors (76664210000).

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

51256336000 is a wasteful number, since it uses less digits than its factorization.

51256336000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12207 (or 12185 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 51256336000 in words is "fifty-one billion, two hundred fifty-six million, three hundred thirty-six thousand".