71193040370561 has 2 divisors, whose sum is σ = 71193040370562. Its totient is φ = 71193040370560.

The previous prime is 71193040370549. The next prime is 71193040370657. The reversal of 71193040370561 is 16507304039117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68373781096336 + 2819259274225 = 8268844^2 + 1679065^2 .

It is a cyclic number.

It is not a de Polignac number, because 71193040370561 - 2³⁰ = 71191966628737 is a prime.

It is a super-3 number, since 3×71193040370561³ (a number of 43 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71193040370161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35596520185280 + 35596520185281.

It is an arithmetic number, because the mean of its divisors is an integer number (35596520185281).

Almost surely, 2^{71193040370561} is an apocalyptic number.

It is an amenable number.

71193040370561 is a deficient number, since it is larger than the sum of its proper divisors (1).

71193040370561 is an equidigital number, since it uses as much as digits as its factorization.

71193040370561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 71193040370561 in words is "seventy-one trillion, one hundred ninety-three billion, forty million, three hundred seventy thousand, five hundred sixty-one".