240400553209 has 2 divisors, whose sum is σ = 240400553210. Its totient is φ = 240400553208.

The previous prime is 240400553171. The next prime is 240400553231. The reversal of 240400553209 is 902355004042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138685484025 + 101715069184 = 372405^2 + 318928^2 .

It is a cyclic number.

It is not a de Polignac number, because 240400553209 - 2¹⁵ = 240400520441 is a prime.

It is not a weakly prime, because it can be changed into another prime (240400553249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120200276604 + 120200276605.

It is an arithmetic number, because the mean of its divisors is an integer number (120200276605).

Almost surely, 2^240400553209 is an apocalyptic number.

It is an amenable number.

240400553209 is a deficient number, since it is larger than the sum of its proper divisors (1).

240400553209 is an equidigital number, since it uses as much as digits as its factorization.

240400553209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 240400553209 in words is "two hundred forty billion, four hundred million, five hundred fifty-three thousand, two hundred nine".