71538145965787 has 2 divisors, whose sum is σ = 71538145965788. Its totient is φ = 71538145965786.

The previous prime is 71538145965779. The next prime is 71538145965899. The reversal of 71538145965787 is 78756954183517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71538145965787 - 2³ = 71538145965779 is a prime.

It is a super-3 number, since 3×71538145965787³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71538145965757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35769072982893 + 35769072982894.

It is an arithmetic number, because the mean of its divisors is an integer number (35769072982894).

Almost surely, 2^{71538145965787} is an apocalyptic number.

71538145965787 is a deficient number, since it is larger than the sum of its proper divisors (1).

71538145965787 is an equidigital number, since it uses as much as digits as its factorization.

71538145965787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112000, while the sum is 76.

The spelling of 71538145965787 in words is "seventy-one trillion, five hundred thirty-eight billion, one hundred forty-five million, nine hundred sixty-five thousand, seven hundred eighty-seven".