51011819248 has 80 divisors (see below), whose sum is σ = 112131885600. Its totient is φ = 22286499840.

The previous prime is 51011819239. The next prime is 51011819293. The reversal of 51011819248 is 84291811015.

It is a self number, because there is not a number n which added to its sum of digits gives 51011819248.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5563788 + ... + 5572948.

It is an arithmetic number, because the mean of its divisors is an integer number (1401648570).

Almost surely, 2^51011819248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51011819248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56065942800).

51011819248 is an abundant number, since it is smaller than the sum of its proper divisors (61120066352).

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

51011819248 is a wasteful number, since it uses less digits than its factorization.

51011819248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10610 (or 10604 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 40.

The spelling of 51011819248 in words is "fifty-one billion, eleven million, eight hundred nineteen thousand, two hundred forty-eight".