51913318577 has 2 divisors, whose sum is σ = 51913318578. Its totient is φ = 51913318576.

The previous prime is 51913318559. The next prime is 51913318603. The reversal of 51913318577 is 77581331915.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50072565361 + 1840753216 = 223769^2 + 42904^2 .

It is a cyclic number.

It is not a de Polignac number, because 51913318577 - 2²² = 51909124273 is a prime.

It is a super-3 number, since 3×51913318577³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (51913318777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25956659288 + 25956659289.

It is an arithmetic number, because the mean of its divisors is an integer number (25956659289).

Almost surely, 2^51913318577 is an apocalyptic number.

It is an amenable number.

51913318577 is a deficient number, since it is larger than the sum of its proper divisors (1).

51913318577 is an equidigital number, since it uses as much as digits as its factorization.

51913318577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 50.

The spelling of 51913318577 in words is "fifty-one billion, nine hundred thirteen million, three hundred eighteen thousand, five hundred seventy-seven".