51511340650616 has 96 divisors (see below), whose sum is σ = 121381591628640. Its totient is φ = 20060548992000.

The previous prime is 51511340650571. The next prime is 51511340650691. The reversal of 51511340650616 is 61605604311515.

51511340650616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13789676 + ... + 17122436.

It is an arithmetic number, because the mean of its divisors is an integer number (1264391579465).

Almost surely, 2^{51511340650616} is an apocalyptic number.

51511340650616 is a gapful number since it is divisible by the number (56) 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 51511340650616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60690795814320).

51511340650616 is an abundant number, since it is smaller than the sum of its proper divisors (69870250978024).

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

51511340650616 is a wasteful number, since it uses less digits than its factorization.

51511340650616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3335077 (or 3335062 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 51511340650616 in words is "fifty-one trillion, five hundred eleven billion, three hundred forty million, six hundred fifty thousand, six hundred sixteen".