73475317261 has 2 divisors, whose sum is σ = 73475317262. Its totient is φ = 73475317260.

The previous prime is 73475317247. The next prime is 73475317271. The reversal of 73475317261 is 16271357437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69340055625 + 4135261636 = 263325^2 + 64306^2 .

It is an emirp because it is prime and its reverse (16271357437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73475317261 - 2⁵ = 73475317229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73475317271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36737658630 + 36737658631.

It is an arithmetic number, because the mean of its divisors is an integer number (36737658631).

Almost surely, 2^73475317261 is an apocalyptic number.

It is an amenable number.

73475317261 is a deficient number, since it is larger than the sum of its proper divisors (1).

73475317261 is an equidigital number, since it uses as much as digits as its factorization.

73475317261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 46.

The spelling of 73475317261 in words is "seventy-three billion, four hundred seventy-five million, three hundred seventeen thousand, two hundred sixty-one".