71563020756361 has 16 divisors (see below), whose sum is σ = 74796464793600. Its totient is φ = 68382096084288.

The previous prime is 71563020756349. The next prime is 71563020756391. The reversal of 71563020756361 is 16365702036517.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71563020756361 - 2⁴³ = 62766927734153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71563020756299 and 71563020756308.

It is not an unprimeable number, because it can be changed into a prime (71563020756391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10388721 + ... + 15844606.

It is an arithmetic number, because the mean of its divisors is an integer number (4674779049600).

Almost surely, 2^{71563020756361} is an apocalyptic number.

It is an amenable number.

71563020756361 is a deficient number, since it is larger than the sum of its proper divisors (3233444037239).

71563020756361 is a wasteful number, since it uses less digits than its factorization.

71563020756361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26234328.

The product of its (nonzero) digits is 4762800, while the sum is 52.

The spelling of 71563020756361 in words is "seventy-one trillion, five hundred sixty-three billion, twenty million, seven hundred fifty-six thousand, three hundred sixty-one".