51513041077 has 2 divisors, whose sum is σ = 51513041078. Its totient is φ = 51513041076.

The previous prime is 51513041071. The next prime is 51513041221. The reversal of 51513041077 is 77014031515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51495409476 + 17631601 = 226926^2 + 4199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51513041077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51513041071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756520538 + 25756520539.

It is an arithmetic number, because the mean of its divisors is an integer number (25756520539).

Almost surely, 2^51513041077 is an apocalyptic number.

It is an amenable number.

51513041077 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513041077 is an equidigital number, since it uses as much as digits as its factorization.

51513041077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The spelling of 51513041077 in words is "fifty-one billion, five hundred thirteen million, forty-one thousand, seventy-seven".