51827695920 has 720 divisors, whose sum is σ = 237892086432. Its totient is φ = 9940008960.

The previous prime is 51827695891. The next prime is 51827695921. The reversal of 51827695920 is 2959672815.

51827695920 is a `hidden beast` number, since 518 + 2 + 76 + 9 + 59 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a super-2 number, since 2×51827695920² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51827695921) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 5039904 + ... + 5050176.

Almost surely, 2^51827695920 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 51827695920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118946043216).

51827695920 is an abundant number, since it is smaller than the sum of its proper divisors (186064390512).

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

51827695920 is a wasteful number, since it uses less digits than its factorization.

51827695920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330 (or 10314 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

It can be divided in two parts, 51827 and 695920, that added together give a palindrome (747747).

The spelling of 51827695920 in words is "fifty-one billion, eight hundred twenty-seven million, six hundred ninety-five thousand, nine hundred twenty".