268761649984 has 56 divisors (see below), whose sum is σ = 544429188000. Its totient is φ = 131592374784.

The previous prime is 268761649979. The next prime is 268761649997. The reversal of 268761649984 is 489946167862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1698267 + ... + 1849765.

Almost surely, 2^268761649984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268761649984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272214594000).

268761649984 is an abundant number, since it is smaller than the sum of its proper divisors (275667538016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

268761649984 is a wasteful number, since it uses less digits than its factorization.

268761649984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152087 (or 152077 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 70.

The spelling of 268761649984 in words is "two hundred sixty-eight billion, seven hundred sixty-one million, six hundred forty-nine thousand, nine hundred eighty-four".