71591627473 has 2 divisors, whose sum is σ = 71591627474. Its totient is φ = 71591627472.

The previous prime is 71591627431. The next prime is 71591627521. The reversal of 71591627473 is 37472619517.

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., 39413366784 + 32178260689 = 198528^2 + 179383^2 .

It is a cyclic number.

It is not a de Polignac number, because 71591627473 - 2¹⁷ = 71591496401 is a prime.

It is a super-2 number, since 2×71591627473² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71591627473.

It is not a weakly prime, because it can be changed into another prime (71591627273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35795813736 + 35795813737.

It is an arithmetic number, because the mean of its divisors is an integer number (35795813737).

Almost surely, 2^71591627473 is an apocalyptic number.

It is an amenable number.

71591627473 is a deficient number, since it is larger than the sum of its proper divisors (1).

71591627473 is an equidigital number, since it uses as much as digits as its factorization.

71591627473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2222640, while the sum is 52.

The spelling of 71591627473 in words is "seventy-one billion, five hundred ninety-one million, six hundred twenty-seven thousand, four hundred seventy-three".