51368210668251 has 12 divisors (see below), whose sum is σ = 77424549413328. Its totient is φ = 32756540136144.

The previous prime is 51368210668133. The next prime is 51368210668267. The reversal of 51368210668251 is 15286601286315.

51368210668251 is a `hidden beast` number, since 5 + 1 + 368 + 21 + 0 + 6 + 6 + 8 + 251 = 666.

It is not a de Polignac number, because 51368210668251 - 2²⁹ = 51367673797339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51368210667251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124077803340 + ... + 124077803753.

It is an arithmetic number, because the mean of its divisors is an integer number (6452045784444).

Almost surely, 2^{51368210668251} is an apocalyptic number.

51368210668251 is a deficient number, since it is larger than the sum of its proper divisors (26056338745077).

51368210668251 is a wasteful number, since it uses less digits than its factorization.

51368210668251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248155607122 (or 248155607119 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 51368210668251 in words is "fifty-one trillion, three hundred sixty-eight billion, two hundred ten million, six hundred sixty-eight thousand, two hundred fifty-one".