201024178009 has 2 divisors, whose sum is σ = 201024178010. Its totient is φ = 201024178008.

The previous prime is 201024177983. The next prime is 201024178073. The reversal of 201024178009 is 900871420102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198562033609 + 2462144400 = 445603^2 + 49620^2 .

It is a cyclic number.

It is not a de Polignac number, because 201024178009 - 2¹⁵ = 201024145241 is a prime.

It is not a weakly prime, because it can be changed into another prime (201024178099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100512089004 + 100512089005.

It is an arithmetic number, because the mean of its divisors is an integer number (100512089005).

Almost surely, 2^201024178009 is an apocalyptic number.

It is an amenable number.

201024178009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201024178009 is an equidigital number, since it uses as much as digits as its factorization.

201024178009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 201024178009 in words is "two hundred one billion, twenty-four million, one hundred seventy-eight thousand, nine".