209990581248 has 88 divisors (see below), whose sum is σ = 639658874752. Its totient is φ = 59997302784.

The previous prime is 209990581247. The next prime is 209990581253. The reversal of 209990581248 is 842185099902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209990581247) 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, 4861090 + ... + 4904097.

Almost surely, 2^209990581248 is an apocalyptic number.

209990581248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

209990581248 is an abundant number, since it is smaller than the sum of its proper divisors (429668293504).

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

209990581248 is an equidigital number, since it uses as much as digits as its factorization.

209990581248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9765217 (or 9765199 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 57.

The spelling of 209990581248 in words is "two hundred nine billion, nine hundred ninety million, five hundred eighty-one thousand, two hundred forty-eight".