78450601059989 has 2 divisors, whose sum is σ = 78450601059990. Its totient is φ = 78450601059988.

The previous prime is 78450601059967. The next prime is 78450601060037. The reversal of 78450601059989 is 98995010605487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78238801372900 + 211799687089 = 8845270^2 + 460217^2 .

It is an emirp because it is prime and its reverse (98995010605487) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78450601059989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78450601058989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39225300529994 + 39225300529995.

It is an arithmetic number, because the mean of its divisors is an integer number (39225300529995).

Almost surely, 2^{78450601059989} is an apocalyptic number.

It is an amenable number.

78450601059989 is a deficient number, since it is larger than the sum of its proper divisors (1).

78450601059989 is an equidigital number, since it uses as much as digits as its factorization.

78450601059989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 195955200, while the sum is 71.

The spelling of 78450601059989 in words is "seventy-eight trillion, four hundred fifty billion, six hundred one million, fifty-nine thousand, nine hundred eighty-nine".