51665226360 has 256 divisors, whose sum is σ = 178350336000. Its totient is φ = 11841384960.

The previous prime is 51665226359. The next prime is 51665226397. The reversal of 51665226360 is 6362256615.

51665226360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51665226360² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14118211 + ... + 14121869.

It is an arithmetic number, because the mean of its divisors is an integer number (696681000).

Almost surely, 2^51665226360 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 51665226360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89175168000).

51665226360 is an abundant number, since it is smaller than the sum of its proper divisors (126685109640).

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

51665226360 is a wasteful number, since it uses less digits than its factorization.

51665226360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4262 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 51665226360 in words is "fifty-one billion, six hundred sixty-five million, two hundred twenty-six thousand, three hundred sixty".