71242533949 has 2 divisors, whose sum is σ = 71242533950. Its totient is φ = 71242533948.

The previous prime is 71242533911. The next prime is 71242533959. The reversal of 71242533949 is 94933524217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62241268324 + 9001265625 = 249482^2 + 94875^2 .

It is a cyclic number.

It is not a de Polignac number, because 71242533949 - 2²¹ = 71240436797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71242533959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35621266974 + 35621266975.

It is an arithmetic number, because the mean of its divisors is an integer number (35621266975).

Almost surely, 2^71242533949 is an apocalyptic number.

It is an amenable number.

71242533949 is a deficient number, since it is larger than the sum of its proper divisors (1).

71242533949 is an equidigital number, since it uses as much as digits as its factorization.

71242533949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The spelling of 71242533949 in words is "seventy-one billion, two hundred forty-two million, five hundred thirty-three thousand, nine hundred forty-nine".