268889209501 has 32 divisors (see below), whose sum is σ = 298726952832. Its totient is φ = 240000000000.

The previous prime is 268889209499. The next prime is 268889209529. The reversal of 268889209501 is 105902988862.

It is a 7-Lehmer number, since φ(268889209501) divides (268889209501-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 268889209501 - 2¹ = 268889209499 is a prime.

It is a deceptive number, since it divides R_268889209500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268889209591) 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 in 31 ways as a sum of consecutive naturals, for example, 67203501 + ... + 67207501.

It is an arithmetic number, because the mean of its divisors is an integer number (9335217276).

Almost surely, 2^268889209501 is an apocalyptic number.

268889209501 is the 231901-st centered decagonal number.

It is an amenable number.

268889209501 is a deficient number, since it is larger than the sum of its proper divisors (29837743331).

268889209501 is a wasteful number, since it uses less digits than its factorization.

268889209501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605.

The product of its (nonzero) digits is 4976640, while the sum is 58.

The spelling of 268889209501 in words is "two hundred sixty-eight billion, eight hundred eighty-nine million, two hundred nine thousand, five hundred one".