51640654025044 has 12 divisors (see below), whose sum is σ = 103281308050144. Its totient is φ = 22131708867864.

The previous prime is 51640654025041. The next prime is 51640654025053. The reversal of 51640654025044 is 44052045604615.

51640654025044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 51640654024985 and 51640654025003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51640654025041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922154536134 + ... + 922154536189.

Almost surely, 2^{51640654025044} is an apocalyptic number.

It is an amenable number.

51640654025044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51640654025044 is a wasteful number, since it uses less digits than its factorization.

51640654025044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844309072334 (or 1844309072332 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 46.

Adding to 51640654025044 its reverse (44052045604615), we get a palindrome (95692699629659).

The spelling of 51640654025044 in words is "fifty-one trillion, six hundred forty billion, six hundred fifty-four million, twenty-five thousand, forty-four".