18259272509507 has 2 divisors, whose sum is σ = 18259272509508. Its totient is φ = 18259272509506.

The previous prime is 18259272509479. The next prime is 18259272509539. The reversal of 18259272509507 is 70590527295281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18259272509507 - 2²² = 18259268315203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18259272509507.

It is not a weakly prime, because it can be changed into another prime (18259272529507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9129636254753 + 9129636254754.

It is an arithmetic number, because the mean of its divisors is an integer number (9129636254754).

Almost surely, 2^{18259272509507} is an apocalyptic number.

18259272509507 is a deficient number, since it is larger than the sum of its proper divisors (1).

18259272509507 is an equidigital number, since it uses as much as digits as its factorization.

18259272509507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752000, while the sum is 62.

Adding to 18259272509507 its sum of digits (62), we get a square (18259272509569 = 4273087²).

The spelling of 18259272509507 in words is "eighteen trillion, two hundred fifty-nine billion, two hundred seventy-two million, five hundred nine thousand, five hundred seven".