9851681456 has 20 divisors (see below), whose sum is σ = 19703363904. Its totient is φ = 4766942400.

The previous prime is 9851681429. The next prime is 9851681551. The reversal of 9851681456 is 6541861589.

9851681456 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 9851681398 and 9851681407.

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, 9930635 + ... + 9931626.

Almost surely, 2^9851681456 is an apocalyptic number.

It is an amenable number.

9851681456 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

9851681456 is a wasteful number, since it uses less digits than its factorization.

9851681456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19862300 (or 19862294 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 53.

The square root of 9851681456 is about 99255.6368978609. The cubic root of 9851681456 is about 2143.7301711273.

The spelling of 9851681456 in words is "nine billion, eight hundred fifty-one million, six hundred eighty-one thousand, four hundred fifty-six".