509554640939 has 2 divisors, whose sum is σ = 509554640940. Its totient is φ = 509554640938.

The previous prime is 509554640891. The next prime is 509554640989. The reversal of 509554640939 is 939046455905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509554640939 - 2¹⁶ = 509554575403 is a prime.

It is not a weakly prime, because it can be changed into another prime (509554640989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254777320469 + 254777320470.

It is an arithmetic number, because the mean of its divisors is an integer number (254777320470).

Almost surely, 2^509554640939 is an apocalyptic number.

509554640939 is a deficient number, since it is larger than the sum of its proper divisors (1).

509554640939 is an equidigital number, since it uses as much as digits as its factorization.

509554640939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244000, while the sum is 59.

The spelling of 509554640939 in words is "five hundred nine billion, five hundred fifty-four million, six hundred forty thousand, nine hundred thirty-nine".