71422562509 has 2 divisors, whose sum is σ = 71422562510. Its totient is φ = 71422562508.

The previous prime is 71422562489. The next prime is 71422562521. The reversal of 71422562509 is 90526522417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71422562500 + 9 = 267250^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 71422562509 - 2²¹ = 71420465357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71422562209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35711281254 + 35711281255.

It is an arithmetic number, because the mean of its divisors is an integer number (35711281255).

Almost surely, 2^71422562509 is an apocalyptic number.

It is an amenable number.

71422562509 is a deficient number, since it is larger than the sum of its proper divisors (1).

71422562509 is an equidigital number, since it uses as much as digits as its factorization.

71422562509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 71422562509 in words is "seventy-one billion, four hundred twenty-two million, five hundred sixty-two thousand, five hundred nine".