247989398816 has 12 divisors (see below), whose sum is σ = 488229128982. Its totient is φ = 123994699392.

The previous prime is 247989398753. The next prime is 247989398927. The reversal of 247989398816 is 618893989742.

It can be written as a sum of positive squares in only one way, i.e., 133081958416 + 114907440400 = 364804^2 + 338980^2 .

It is a super-2 number, since 2×247989398816² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3874834325 + ... + 3874834388.

Almost surely, 2^247989398816 is an apocalyptic number.

It is an amenable number.

247989398816 is a deficient number, since it is larger than the sum of its proper divisors (240239730166).

247989398816 is an equidigital number, since it uses as much as digits as its factorization.

247989398816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7749668723 (or 7749668715 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 74.

The spelling of 247989398816 in words is "two hundred forty-seven billion, nine hundred eighty-nine million, three hundred ninety-eight thousand, eight hundred sixteen".