78940603763971 has 2 divisors, whose sum is σ = 78940603763972. Its totient is φ = 78940603763970.

The previous prime is 78940603763939. The next prime is 78940603764037. The reversal of 78940603763971 is 17936730604987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78940603763971 - 2⁵ = 78940603763939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78940603763971.

It is not a weakly prime, because it can be changed into another prime (78940603743971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39470301881985 + 39470301881986.

It is an arithmetic number, because the mean of its divisors is an integer number (39470301881986).

Almost surely, 2^{78940603763971} is an apocalyptic number.

78940603763971 is a deficient number, since it is larger than the sum of its proper divisors (1).

78940603763971 is an equidigital number, since it uses as much as digits as its factorization.

78940603763971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288054144, while the sum is 70.

The spelling of 78940603763971 in words is "seventy-eight trillion, nine hundred forty billion, six hundred three million, seven hundred sixty-three thousand, nine hundred seventy-one".