72163670149 has 2 divisors, whose sum is σ = 72163670150. Its totient is φ = 72163670148.

The previous prime is 72163670129. The next prime is 72163670273. The reversal of 72163670149 is 94107636127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57326724900 + 14836945249 = 239430^2 + 121807^2 .

It is an emirp because it is prime and its reverse (94107636127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72163670149 - 2¹³ = 72163661957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 72163670099 and 72163670108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72163670129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081835074 + 36081835075.

It is an arithmetic number, because the mean of its divisors is an integer number (36081835075).

Almost surely, 2^72163670149 is an apocalyptic number.

It is an amenable number.

72163670149 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163670149 is an equidigital number, since it uses as much as digits as its factorization.

72163670149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 72163670149 in words is "seventy-two billion, one hundred sixty-three million, six hundred seventy thousand, one hundred forty-nine".