71554825553 has 2 divisors, whose sum is σ = 71554825554. Its totient is φ = 71554825552.

The previous prime is 71554825457. The next prime is 71554825571. The reversal of 71554825553 is 35552845517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53869017409 + 17685808144 = 232097^2 + 132988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71554825553 is a prime.

It is not a weakly prime, because it can be changed into another prime (71554825753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35777412776 + 35777412777.

It is an arithmetic number, because the mean of its divisors is an integer number (35777412777).

Almost surely, 2^71554825553 is an apocalyptic number.

It is an amenable number.

71554825553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71554825553 is an equidigital number, since it uses as much as digits as its factorization.

71554825553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200000, while the sum is 50.

The spelling of 71554825553 in words is "seventy-one billion, five hundred fifty-four million, eight hundred twenty-five thousand, five hundred fifty-three".