63910721879 has 2 divisors, whose sum is σ = 63910721880. Its totient is φ = 63910721878.

The previous prime is 63910721869. The next prime is 63910721899. The reversal of 63910721879 is 97812701936.

63910721879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63910721879 - 2⁴ = 63910721863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63910721879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63910721869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31955360939 + 31955360940.

It is an arithmetic number, because the mean of its divisors is an integer number (31955360940).

Almost surely, 2^63910721879 is an apocalyptic number.

63910721879 is a deficient number, since it is larger than the sum of its proper divisors (1).

63910721879 is an equidigital number, since it uses as much as digits as its factorization.

63910721879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 63910721879 in words is "sixty-three billion, nine hundred ten million, seven hundred twenty-one thousand, eight hundred seventy-nine".