51651050000 has 120 divisors (see below), whose sum is σ = 136457141184. Its totient is φ = 18782000000.

The previous prime is 51651049999. The next prime is 51651050029. The reversal of 51651050000 is 5015615.

It is a super-2 number, since 2×51651050000² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503045 + ... + 596955.

Almost surely, 2^51651050000 is an apocalyptic number.

51651050000 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 51651050000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68228570592).

51651050000 is an abundant number, since it is smaller than the sum of its proper divisors (84806091184).

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

51651050000 is an equidigital number, since it uses as much as digits as its factorization.

51651050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93955 (or 93929 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 51651050000 its reverse (5015615), we get a palindrome (51656065615).

The spelling of 51651050000 in words is "fifty-one billion, six hundred fifty-one million, fifty thousand".