71306408268761 has 4 divisors (see below), whose sum is σ = 71317329765300. Its totient is φ = 71295486772224.

The previous prime is 71306408268703. The next prime is 71306408268773. The reversal of 71306408268761 is 16786280460317.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33131075521600 + 38175332747161 = 5755960^2 + 6178619^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71306408268761 is a prime.

It is a super-2 number, since 2×71306408268761² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71306408268761.

It is not an unprimeable number, because it can be changed into a prime (71306408268791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5460738476 + ... + 5460751533.

It is an arithmetic number, because the mean of its divisors is an integer number (17829332441325).

Almost surely, 2^{71306408268761} is an apocalyptic number.

It is an amenable number.

71306408268761 is a deficient number, since it is larger than the sum of its proper divisors (10921496539).

71306408268761 is a wasteful number, since it uses less digits than its factorization.

71306408268761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921496538.

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 71306408268761 in words is "seventy-one trillion, three hundred six billion, four hundred eight million, two hundred sixty-eight thousand, seven hundred sixty-one".