51511206577 has 2 divisors, whose sum is σ = 51511206578. Its totient is φ = 51511206576.

The previous prime is 51511206553. The next prime is 51511206589. The reversal of 51511206577 is 77560211515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51282319936 + 228886641 = 226456^2 + 15129^2 .

It is a cyclic number.

It is not a de Polignac number, because 51511206577 - 2²³ = 51502817969 is a prime.

It is not a weakly prime, because it can be changed into another prime (51511206077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25755603288 + 25755603289.

It is an arithmetic number, because the mean of its divisors is an integer number (25755603289).

Almost surely, 2^51511206577 is an apocalyptic number.

It is an amenable number.

51511206577 is a deficient number, since it is larger than the sum of its proper divisors (1).

51511206577 is an equidigital number, since it uses as much as digits as its factorization.

51511206577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 51511206577 in words is "fifty-one billion, five hundred eleven million, two hundred six thousand, five hundred seventy-seven".