71473131553 has 2 divisors, whose sum is σ = 71473131554. Its totient is φ = 71473131552.

The previous prime is 71473131539. The next prime is 71473131581. The reversal of 71473131553 is 35513137417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66040262289 + 5432869264 = 256983^2 + 73708^2 .

It is a cyclic number.

It is not a de Polignac number, because 71473131553 - 2²⁹ = 70936260641 is a prime.

It is not a weakly prime, because it can be changed into another prime (71473131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35736565776 + 35736565777.

It is an arithmetic number, because the mean of its divisors is an integer number (35736565777).

Almost surely, 2^71473131553 is an apocalyptic number.

It is an amenable number.

71473131553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71473131553 is an equidigital number, since it uses as much as digits as its factorization.

71473131553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 40.

The spelling of 71473131553 in words is "seventy-one billion, four hundred seventy-three million, one hundred thirty-one thousand, five hundred fifty-three".