65181377157257 has 2 divisors, whose sum is σ = 65181377157258. Its totient is φ = 65181377157256.

The previous prime is 65181377157251. The next prime is 65181377157301. The reversal of 65181377157257 is 75275177318156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62745346070416 + 2436031086841 = 7921196^2 + 1560779^2 .

It is a cyclic number.

It is not a de Polignac number, because 65181377157257 - 2⁴ = 65181377157241 is a prime.

It is a super-2 number, since 2×65181377157257² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65181377157193 and 65181377157202.

It is not a weakly prime, because it can be changed into another prime (65181377157251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32590688578628 + 32590688578629.

It is an arithmetic number, because the mean of its divisors is an integer number (32590688578629).

Almost surely, 2^{65181377157257} is an apocalyptic number.

It is an amenable number.

65181377157257 is a deficient number, since it is larger than the sum of its proper divisors (1).

65181377157257 is an equidigital number, since it uses as much as digits as its factorization.

65181377157257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86436000, while the sum is 65.

The spelling of 65181377157257 in words is "sixty-five trillion, one hundred eighty-one billion, three hundred seventy-seven million, one hundred fifty-seven thousand, two hundred fifty-seven".