51326510000 has 100 divisors (see below), whose sum is σ = 124474367952. Its totient is φ = 20496288000.

The previous prime is 51326509999. The next prime is 51326510009. The reversal of 51326510000 is 1562315.

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (51326510009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6466034 + ... + 6473966.

Almost surely, 2^51326510000 is an apocalyptic number.

51326510000 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 51326510000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62237183976).

51326510000 is an abundant number, since it is smaller than the sum of its proper divisors (73147857952).

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

51326510000 is an equidigital number, since it uses as much as digits as its factorization.

51326510000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8608 (or 8587 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 51326510000 in words is "fifty-one billion, three hundred twenty-six million, five hundred ten thousand".