249968689453 has 8 divisors (see below), whose sum is σ = 285682138560. Its totient is φ = 214256149440.

The previous prime is 249968689427. The next prime is 249968689459. The reversal of 249968689453 is 354986869942.

249968689453 is a nontrivial binomial coefficient, being equal to C(707063, 2).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249968689453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249968689459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530298 + ... + 883828.

It is an arithmetic number, because the mean of its divisors is an integer number (35710267320).

Almost surely, 2^249968689453 is an apocalyptic number.

249968689453 is the 707062-nd triangular number.

249968689453 is the 235688-th centered nonagonal number.

It is an amenable number.

249968689453 is a deficient number, since it is larger than the sum of its proper divisors (35713449107).

249968689453 is a wasteful number, since it uses less digits than its factorization.

249968689453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454547.

The product of its digits is 806215680, while the sum is 73.

The spelling of 249968689453 in words is "two hundred forty-nine billion, nine hundred sixty-eight million, six hundred eighty-nine thousand, four hundred fifty-three".