71603982553 has 2 divisors, whose sum is σ = 71603982554. Its totient is φ = 71603982552.

The previous prime is 71603982533. The next prime is 71603982617. The reversal of 71603982553 is 35528930617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71603337744 + 644809 = 267588^2 + 803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71603982553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71603982497 and 71603982506.

It is not a weakly prime, because it can be changed into another prime (71603982533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35801991276 + 35801991277.

It is an arithmetic number, because the mean of its divisors is an integer number (35801991277).

Almost surely, 2^71603982553 is an apocalyptic number.

It is an amenable number.

71603982553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71603982553 is an equidigital number, since it uses as much as digits as its factorization.

71603982553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 71603982553 in words is "seventy-one billion, six hundred three million, nine hundred eighty-two thousand, five hundred fifty-three".