72163428041 has 4 divisors (see below), whose sum is σ = 72647746500. Its totient is φ = 71679109584.

The previous prime is 72163428031. The next prime is 72163428079. The reversal of 72163428041 is 14082436127.

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 42302205625 + 29861222416 = 205675^2 + 172804^2 .

It is a cyclic number.

It is not a de Polignac number, because 72163428041 - 2⁶ = 72163427977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72163427986 and 72163428004.

It is not an unprimeable number, because it can be changed into a prime (72163428031) 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, 242159006 + ... + 242159303.

It is an arithmetic number, because the mean of its divisors is an integer number (18161936625).

Almost surely, 2^72163428041 is an apocalyptic number.

It is an amenable number.

72163428041 is a deficient number, since it is larger than the sum of its proper divisors (484318459).

72163428041 is a wasteful number, since it uses less digits than its factorization.

72163428041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484318458.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 72163428041 in words is "seventy-two billion, one hundred sixty-three million, four hundred twenty-eight thousand, forty-one".