74810405261 has 2 divisors, whose sum is σ = 74810405262. Its totient is φ = 74810405260.

The previous prime is 74810405177. The next prime is 74810405317. The reversal of 74810405261 is 16250401847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64322597161 + 10487808100 = 253619^2 + 102410^2 .

It is a cyclic number.

It is not a de Polignac number, because 74810405261 - 2¹⁰ = 74810404237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74810405161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37405202630 + 37405202631.

It is an arithmetic number, because the mean of its divisors is an integer number (37405202631).

Almost surely, 2^74810405261 is an apocalyptic number.

It is an amenable number.

74810405261 is a deficient number, since it is larger than the sum of its proper divisors (1).

74810405261 is an equidigital number, since it uses as much as digits as its factorization.

74810405261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The spelling of 74810405261 in words is "seventy-four billion, eight hundred ten million, four hundred five thousand, two hundred sixty-one".