51236511077 has 2 divisors, whose sum is σ = 51236511078. Its totient is φ = 51236511076.

The previous prime is 51236510999. The next prime is 51236511083. The reversal of 51236511077 is 77011563215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31598973121 + 19637537956 = 177761^2 + 140134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51236511077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51236511077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51236511097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25618255538 + 25618255539.

It is an arithmetic number, because the mean of its divisors is an integer number (25618255539).

Almost surely, 2^51236511077 is an apocalyptic number.

It is an amenable number.

51236511077 is a deficient number, since it is larger than the sum of its proper divisors (1).

51236511077 is an equidigital number, since it uses as much as digits as its factorization.

51236511077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 51236511077 in words is "fifty-one billion, two hundred thirty-six million, five hundred eleven thousand, seventy-seven".