51653730544 has 60 divisors (see below), whose sum is σ = 108430318200. Its totient is φ = 23826845952.

The previous prime is 51653730539. The next prime is 51653730547. The reversal of 51653730544 is 44503735615.

It is a super-2 number, since 2×51653730544² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51653730544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51653730547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6131167 + ... + 6139585.

It is an arithmetic number, because the mean of its divisors is an integer number (1807171970).

Almost surely, 2^51653730544 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 51653730544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54215159100).

51653730544 is an abundant number, since it is smaller than the sum of its proper divisors (56776587656).

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

51653730544 is a wasteful number, since it uses less digits than its factorization.

51653730544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722 (or 10703 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 51653730544 in words is "fifty-one billion, six hundred fifty-three million, seven hundred thirty thousand, five hundred forty-four".