51690260160 has 1344 divisors, whose sum is σ = 234853032960. Its totient is φ = 10510663680.

The previous prime is 51690260147. The next prime is 51690260161. The reversal of 51690260160 is 6106209615.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51690260161) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 532889232 + ... + 532889328.

It is an arithmetic number, because the mean of its divisors is an integer number (174741840).

Almost surely, 2^51690260160 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 51690260160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117426516480).

51690260160 is an abundant number, since it is smaller than the sum of its proper divisors (183162772800).

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

51690260160 is a wasteful number, since it uses less digits than its factorization.

51690260160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

Adding to 51690260160 its reverse (6106209615), we get a palindrome (57796469775).

The spelling of 51690260160 in words is "fifty-one billion, six hundred ninety million, two hundred sixty thousand, one hundred sixty".