71534843551 has 2 divisors, whose sum is σ = 71534843552. Its totient is φ = 71534843550.

The previous prime is 71534843491. The next prime is 71534843579. The reversal of 71534843551 is 15534843517.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71534843551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71534843581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35767421775 + 35767421776.

It is an arithmetic number, because the mean of its divisors is an integer number (35767421776).

Almost surely, 2^71534843551 is an apocalyptic number.

71534843551 is a deficient number, since it is larger than the sum of its proper divisors (1).

71534843551 is an equidigital number, since it uses as much as digits as its factorization.

71534843551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008000, while the sum is 46.

The spelling of 71534843551 in words is "seventy-one billion, five hundred thirty-four million, eight hundred forty-three thousand, five hundred fifty-one".