249865961472 has 114 divisors (see below), whose sum is σ = 721840438748. Its totient is φ = 83287867392.

The previous prime is 249865961447. The next prime is 249865961479. The reversal of 249865961472 is 274169568942.

249865961472 is a `hidden beast` number, since 2 + 4 + 9 + 8 + 6 + 5 + 9 + 614 + 7 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (249865961479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2306343 + ... + 2412249.

Almost surely, 2^249865961472 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 249865961472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360920219374).

249865961472 is an abundant number, since it is smaller than the sum of its proper divisors (471974477276).

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

249865961472 is an frugal number, since it uses more digits than its factorization.

249865961472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105949 (or 105912 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 249865961472 in words is "two hundred forty-nine billion, eight hundred sixty-five million, nine hundred sixty-one thousand, four hundred seventy-two".