78620488841 has 2 divisors, whose sum is σ = 78620488842. Its totient is φ = 78620488840.

The previous prime is 78620488813. The next prime is 78620488847. The reversal of 78620488841 is 14888402687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71011590400 + 7608898441 = 266480^2 + 87229^2 .

It is an emirp because it is prime and its reverse (14888402687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78620488841 - 2³⁴ = 61440619657 is a prime.

It is not a weakly prime, because it can be changed into another prime (78620488847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39310244420 + 39310244421.

It is an arithmetic number, because the mean of its divisors is an integer number (39310244421).

Almost surely, 2^78620488841 is an apocalyptic number.

It is an amenable number.

78620488841 is a deficient number, since it is larger than the sum of its proper divisors (1).

78620488841 is an equidigital number, since it uses as much as digits as its factorization.

78620488841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5505024, while the sum is 56.

The spelling of 78620488841 in words is "seventy-eight billion, six hundred twenty million, four hundred eighty-eight thousand, eight hundred forty-one".