71863129134781 has 2 divisors, whose sum is σ = 71863129134782. Its totient is φ = 71863129134780.

The previous prime is 71863129134707. The next prime is 71863129134883. The reversal of 71863129134781 is 18743192136817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52650029409156 + 19213099725625 = 7256034^2 + 4383275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71863129134781 is a prime.

It is a super-2 number, since 2×71863129134781² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71863129164781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35931564567390 + 35931564567391.

It is an arithmetic number, because the mean of its divisors is an integer number (35931564567391).

Almost surely, 2^{71863129134781} is an apocalyptic number.

It is an amenable number.

71863129134781 is a deficient number, since it is larger than the sum of its proper divisors (1).

71863129134781 is an equidigital number, since it uses as much as digits as its factorization.

71863129134781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 61.

The spelling of 71863129134781 in words is "seventy-one trillion, eight hundred sixty-three billion, one hundred twenty-nine million, one hundred thirty-four thousand, seven hundred eighty-one".