51640642286280 has 48 divisors (see below), whose sum is σ = 167832087431580. Its totient is φ = 13770837942912.

The previous prime is 51640642286279. The next prime is 51640642286293. The reversal of 51640642286280 is 8268224604615.

51640642286280 is a `hidden beast` number, since 5 + 1 + 6 + 4 + 0 + 6 + 4 + 2 + 2 + 8 + 628 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44464597839684 + 7176044446596 = 6668178^2 + 2678814^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71723113927 + ... + 71723114646.

Almost surely, 2^{51640642286280} is an apocalyptic number.

It is an amenable number.

51640642286280 is an abundant number, since it is smaller than the sum of its proper divisors (116191445145300).

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

51640642286280 is a wasteful number, since it uses less digits than its factorization.

51640642286280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143446228590 (or 143446228583 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 54.

The spelling of 51640642286280 in words is "fifty-one trillion, six hundred forty billion, six hundred forty-two million, two hundred eighty-six thousand, two hundred eighty".