51965785107648 has 84 divisors (see below), whose sum is σ = 148988573457360. Its totient is φ = 17317505373696.

The previous prime is 51965785107581. The next prime is 51965785107727. The reversal of 51965785107648 is 84670158756915.

51965785107648 is a `hidden beast` number, since 5 + 1 + 9 + 6 + 578 + 5 + 1 + 0 + 7 + 6 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

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, 9260068 + ... + 13772451.

It is an arithmetic number, because the mean of its divisors is an integer number (1773673493540).

Almost surely, 2^{51965785107648} is an apocalyptic number.

It is an amenable number.

51965785107648 is an abundant number, since it is smaller than the sum of its proper divisors (97022788349712).

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

51965785107648 is a wasteful number, since it uses less digits than its factorization.

51965785107648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23036454 (or 23036441 counting only the distinct ones).

The product of its (nonzero) digits is 508032000, while the sum is 72.

The spelling of 51965785107648 in words is "fifty-one trillion, nine hundred sixty-five billion, seven hundred eighty-five million, one hundred seven thousand, six hundred forty-eight".