71277905651 has 2 divisors, whose sum is σ = 71277905652. Its totient is φ = 71277905650.

The previous prime is 71277905617. The next prime is 71277905669. The reversal of 71277905651 is 15650977217.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71277905651 - 2³⁴ = 54098036467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71277905651.

It is not a weakly prime, because it can be changed into another prime (71277965651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35638952825 + 35638952826.

It is an arithmetic number, because the mean of its divisors is an integer number (35638952826).

Almost surely, 2^71277905651 is an apocalyptic number.

71277905651 is a deficient number, since it is larger than the sum of its proper divisors (1).

71277905651 is an equidigital number, since it uses as much as digits as its factorization.

71277905651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 926100, while the sum is 50.

The spelling of 71277905651 in words is "seventy-one billion, two hundred seventy-seven million, nine hundred five thousand, six hundred fifty-one".