78960438061 has 2 divisors, whose sum is σ = 78960438062. Its totient is φ = 78960438060.

The previous prime is 78960438049. The next prime is 78960438077. The reversal of 78960438061 is 16083406987.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76856472900 + 2103965161 = 277230^2 + 45869^2 .

It is a cyclic number.

It is not a de Polignac number, because 78960438061 - 2¹³ = 78960429869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78960438961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39480219030 + 39480219031.

It is an arithmetic number, because the mean of its divisors is an integer number (39480219031).

Almost surely, 2^78960438061 is an apocalyptic number.

It is an amenable number.

78960438061 is a deficient number, since it is larger than the sum of its proper divisors (1).

78960438061 is an equidigital number, since it uses as much as digits as its factorization.

78960438061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 78960438061 in words is "seventy-eight billion, nine hundred sixty million, four hundred thirty-eight thousand, sixty-one".