51742118377 has 2 divisors, whose sum is σ = 51742118378. Its totient is φ = 51742118376.

The previous prime is 51742118303. The next prime is 51742118387. The reversal of 51742118377 is 77381124715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46951955856 + 4790162521 = 216684^2 + 69211^2 .

It is a cyclic number.

It is not a de Polignac number, because 51742118377 - 2²³ = 51733729769 is a prime.

It is a super-2 number, since 2×51742118377² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51742118387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25871059188 + 25871059189.

It is an arithmetic number, because the mean of its divisors is an integer number (25871059189).

Almost surely, 2^51742118377 is an apocalyptic number.

It is an amenable number.

51742118377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51742118377 is an equidigital number, since it uses as much as digits as its factorization.

51742118377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329280, while the sum is 46.

The spelling of 51742118377 in words is "fifty-one billion, seven hundred forty-two million, one hundred eighteen thousand, three hundred seventy-seven".