71574744541 has 2 divisors, whose sum is σ = 71574744542. Its totient is φ = 71574744540.

The previous prime is 71574744533. The next prime is 71574744551. The reversal of 71574744541 is 14544747517.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42596832100 + 28977912441 = 206390^2 + 170229^2 .

It is a cyclic number.

It is not a de Polignac number, because 71574744541 - 2³ = 71574744533 is a prime.

It is a super-2 number, since 2×71574744541² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71574744511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35787372270 + 35787372271.

It is an arithmetic number, because the mean of its divisors is an integer number (35787372271).

Almost surely, 2^71574744541 is an apocalyptic number.

It is an amenable number.

71574744541 is a deficient number, since it is larger than the sum of its proper divisors (1).

71574744541 is an equidigital number, since it uses as much as digits as its factorization.

71574744541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2195200, while the sum is 49.

The spelling of 71574744541 in words is "seventy-one billion, five hundred seventy-four million, seven hundred forty-four thousand, five hundred forty-one".