51204640521611 has 2 divisors, whose sum is σ = 51204640521612. Its totient is φ = 51204640521610.

The previous prime is 51204640521607. The next prime is 51204640521689. The reversal of 51204640521611 is 11612504640215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51204640521611 - 2² = 51204640521607 is a prime.

It is not a weakly prime, because it can be changed into another prime (51204640527611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25602320260805 + 25602320260806.

It is an arithmetic number, because the mean of its divisors is an integer number (25602320260806).

Almost surely, 2^{51204640521611} is an apocalyptic number.

51204640521611 is a deficient number, since it is larger than the sum of its proper divisors (1).

51204640521611 is an equidigital number, since it uses as much as digits as its factorization.

51204640521611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 51204640521611 in words is "fifty-one trillion, two hundred four billion, six hundred forty million, five hundred twenty-one thousand, six hundred eleven".