249404355216 has 45 divisors (see below), whose sum is σ = 698002571721. Its totient is φ = 83132787456.

The previous prime is 249404355197. The next prime is 249404355269. The reversal of 249404355216 is 612553404942.

The square root of 249404355216 is 499404.

It is a perfect power (a square), and thus also a powerful number.

249404355216 is a `hidden beast` number, since 2 + 4 + 9 + 40 + 43 + 552 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 249380384400 + 23970816 = 499380^2 + 4896^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5972040 + ... + 6013656.

Almost surely, 2^249404355216 is an apocalyptic number.

249404355216 is the 499404-th square number.

It is an amenable number.

249404355216 is an abundant number, since it is smaller than the sum of its proper divisors (448598216505).

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

249404355216 is an frugal number, since it uses more digits than its factorization.

249404355216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83248 (or 41622 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 249404355216 in words is "two hundred forty-nine billion, four hundred four million, three hundred fifty-five thousand, two hundred sixteen".