71765013877 has 2 divisors, whose sum is σ = 71765013878. Its totient is φ = 71765013876.

The previous prime is 71765013871. The next prime is 71765013889. The reversal of 71765013877 is 77831056717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62224803601 + 9540210276 = 249449^2 + 97674^2 .

It is an emirp because it is prime and its reverse (77831056717) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71765013877 is a prime.

It is a super-2 number, since 2×71765013877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71765013871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35882506938 + 35882506939.

It is an arithmetic number, because the mean of its divisors is an integer number (35882506939).

Almost surely, 2^71765013877 is an apocalyptic number.

It is an amenable number.

71765013877 is a deficient number, since it is larger than the sum of its proper divisors (1).

71765013877 is an equidigital number, since it uses as much as digits as its factorization.

71765013877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The spelling of 71765013877 in words is "seventy-one billion, seven hundred sixty-five million, thirteen thousand, eight hundred seventy-seven".