51357838888666 has 16 divisors (see below), whose sum is σ = 77469444900000. Its totient is φ = 25534699157968.

The previous prime is 51357838888661. The next prime is 51357838888667. The reversal of 51357838888666 is 66688883875315.

It is a self number, because there is not a number n which added to its sum of digits gives 51357838888666.

It is not an unprimeable number, because it can be changed into a prime (51357838888661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9956781 + ... + 14207503.

It is an arithmetic number, because the mean of its divisors is an integer number (4841840306250).

Almost surely, 2^{51357838888666} is an apocalyptic number.

51357838888666 is a deficient number, since it is larger than the sum of its proper divisors (26111606011334).

51357838888666 is a wasteful number, since it uses less digits than its factorization.

51357838888666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284653.

The product of its digits is 11147673600, while the sum is 82.

The spelling of 51357838888666 in words is "fifty-one trillion, three hundred fifty-seven billion, eight hundred thirty-eight million, eight hundred eighty-eight thousand, six hundred sixty-six".