51227121677 has 2 divisors, whose sum is σ = 51227121678. Its totient is φ = 51227121676.

The previous prime is 51227121667. The next prime is 51227121691. The reversal of 51227121677 is 77612172215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49592617636 + 1634504041 = 222694^2 + 40429^2 .

It is a cyclic number.

It is not a de Polignac number, because 51227121677 - 2⁴ = 51227121661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51227121607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25613560838 + 25613560839.

It is an arithmetic number, because the mean of its divisors is an integer number (25613560839).

Almost surely, 2^51227121677 is an apocalyptic number.

It is an amenable number.

51227121677 is a deficient number, since it is larger than the sum of its proper divisors (1).

51227121677 is an equidigital number, since it uses as much as digits as its factorization.

51227121677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82320, while the sum is 41.

The spelling of 51227121677 in words is "fifty-one billion, two hundred twenty-seven million, one hundred twenty-one thousand, six hundred seventy-seven".