71648501779 has 2 divisors, whose sum is σ = 71648501780. Its totient is φ = 71648501778.

The previous prime is 71648501759. The next prime is 71648501789. The reversal of 71648501779 is 97710584617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71648501779 - 2⁵ = 71648501747 is a prime.

It is not a weakly prime, because it can be changed into another prime (71648501759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35824250889 + 35824250890.

It is an arithmetic number, because the mean of its divisors is an integer number (35824250890).

Almost surely, 2^71648501779 is an apocalyptic number.

71648501779 is a deficient number, since it is larger than the sum of its proper divisors (1).

71648501779 is an equidigital number, since it uses as much as digits as its factorization.

71648501779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 71648501779 in words is "seventy-one billion, six hundred forty-eight million, five hundred one thousand, seven hundred seventy-nine".