71573022761 has 2 divisors, whose sum is σ = 71573022762. Its totient is φ = 71573022760.

The previous prime is 71573022733. The next prime is 71573022799. The reversal of 71573022761 is 16722037517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70774621225 + 798401536 = 266035^2 + 28256^2 .

It is a cyclic number.

It is not a de Polignac number, because 71573022761 - 2¹⁸ = 71572760617 is a prime.

It is not a weakly prime, because it can be changed into another prime (71573025761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35786511380 + 35786511381.

It is an arithmetic number, because the mean of its divisors is an integer number (35786511381).

Almost surely, 2^71573022761 is an apocalyptic number.

It is an amenable number.

71573022761 is a deficient number, since it is larger than the sum of its proper divisors (1).

71573022761 is an equidigital number, since it uses as much as digits as its factorization.

71573022761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 41.

The spelling of 71573022761 in words is "seventy-one billion, five hundred seventy-three million, twenty-two thousand, seven hundred sixty-one".