9891854912 has 28 divisors (see below), whose sum is σ = 19760907900. Its totient is φ = 4912728576.

The previous prime is 9891854909. The next prime is 9891854939. The reversal of 9891854912 is 2194581989.

It can be written as a sum of positive squares in 2 ways, for example, as 5123123776 + 4768731136 = 71576^2 + 69056^2 .

It is a super-3 number, since 3×9891854912³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509123 + ... + 528194.

Almost surely, 2^9891854912 is an apocalyptic number.

It is an amenable number.

9891854912 is a deficient number, since it is larger than the sum of its proper divisors (9869052988).

9891854912 is a wasteful number, since it uses less digits than its factorization.

9891854912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037478 (or 1037468 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 56.

The square root of 9891854912 is about 99457.8046811813. The cubic root of 9891854912 is about 2146.6401397560.

The spelling of 9891854912 in words is "nine billion, eight hundred ninety-one million, eight hundred fifty-four thousand, nine hundred twelve".