65871187038557 has 2 divisors, whose sum is σ = 65871187038558. Its totient is φ = 65871187038556.

The previous prime is 65871187038529. The next prime is 65871187038667. The reversal of 65871187038557 is 75583078117856.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59053599713956 + 6817587324601 = 7684634^2 + 2611051^2 .

It is a cyclic number.

It is not a de Polignac number, because 65871187038557 - 2⁶ = 65871187038493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65871187031557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32935593519278 + 32935593519279.

It is an arithmetic number, because the mean of its divisors is an integer number (32935593519279).

Almost surely, 2^{65871187038557} is an apocalyptic number.

It is an amenable number.

65871187038557 is a deficient number, since it is larger than the sum of its proper divisors (1).

65871187038557 is an equidigital number, since it uses as much as digits as its factorization.

65871187038557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 395136000, while the sum is 71.

The spelling of 65871187038557 in words is "sixty-five trillion, eight hundred seventy-one billion, one hundred eighty-seven million, thirty-eight thousand, five hundred fifty-seven".