74780008673 has 2 divisors, whose sum is σ = 74780008674. Its totient is φ = 74780008672.

The previous prime is 74780008669. The next prime is 74780008717. The reversal of 74780008673 is 37680008747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71164632289 + 3615376384 = 266767^2 + 60128^2 .

It is a cyclic number.

It is not a de Polignac number, because 74780008673 - 2² = 74780008669 is a prime.

It is not a weakly prime, because it can be changed into another prime (74780008643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37390004336 + 37390004337.

It is an arithmetic number, because the mean of its divisors is an integer number (37390004337).

Almost surely, 2^74780008673 is an apocalyptic number.

It is an amenable number.

74780008673 is a deficient number, since it is larger than the sum of its proper divisors (1).

74780008673 is an equidigital number, since it uses as much as digits as its factorization.

74780008673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 74780008673 in words is "seventy-four billion, seven hundred eighty million, eight thousand, six hundred seventy-three".