71628812287 has 2 divisors, whose sum is σ = 71628812288. Its totient is φ = 71628812286.

The previous prime is 71628812273. The next prime is 71628812351. The reversal of 71628812287 is 78221882617.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71628812287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71628812237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35814406143 + 35814406144.

It is an arithmetic number, because the mean of its divisors is an integer number (35814406144).

Almost surely, 2^71628812287 is an apocalyptic number.

71628812287 is a deficient number, since it is larger than the sum of its proper divisors (1).

71628812287 is an equidigital number, since it uses as much as digits as its factorization.

71628812287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1204224, while the sum is 52.

The spelling of 71628812287 in words is "seventy-one billion, six hundred twenty-eight million, eight hundred twelve thousand, two hundred eighty-seven".