73447041281 has 4 divisors (see below), whose sum is σ = 77767455492. Its totient is φ = 69126627072.

The previous prime is 73447041271. The next prime is 73447041301. The reversal of 73447041281 is 18214074437.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23110080400 + 50336960881 = 152020^2 + 224359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73447041281 is a prime.

It is a super-2 number, since 2×73447041281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73447041271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160207080 + ... + 2160207113.

It is an arithmetic number, because the mean of its divisors is an integer number (19441863873).

Almost surely, 2^73447041281 is an apocalyptic number.

It is an amenable number.

73447041281 is a deficient number, since it is larger than the sum of its proper divisors (4320414211).

73447041281 is a wasteful number, since it uses less digits than its factorization.

73447041281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4320414210.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 73447041281 in words is "seventy-three billion, four hundred forty-seven million, forty-one thousand, two hundred eighty-one".