71765013949 has 2 divisors, whose sum is σ = 71765013950. Its totient is φ = 71765013948.

The previous prime is 71765013911. The next prime is 71765014031. The reversal of 71765013949 is 94931056717.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40649817924 + 31115196025 = 201618^2 + 176395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71765013949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71765013896 and 71765013905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71765016949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35882506974 + 35882506975.

It is an arithmetic number, because the mean of its divisors is an integer number (35882506975).

Almost surely, 2^71765013949 is an apocalyptic number.

It is an amenable number.

71765013949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71765013949 is an equidigital number, since it uses as much as digits as its factorization.

71765013949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 71765013949 in words is "seventy-one billion, seven hundred sixty-five million, thirteen thousand, nine hundred forty-nine".