9749643081 has 8 divisors (see below), whose sum is σ = 13447783680. Its totient is φ = 6275632272.

The previous prime is 9749643073. The next prime is 9749643091. The reversal of 9749643081 is 1803469479.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9749643081 - 2³ = 9749643073 is a prime.

It is a super-2 number, since 2×9749643081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9749643091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56032345 + ... + 56032518.

It is an arithmetic number, because the mean of its divisors is an integer number (1680972960).

Almost surely, 2^9749643081 is an apocalyptic number.

It is an amenable number.

9749643081 is a deficient number, since it is larger than the sum of its proper divisors (3698140599).

9749643081 is a wasteful number, since it uses less digits than its factorization.

9749643081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112064895.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 9749643081 is about 98740.2809445061. The cubic root of 9749643081 is about 2136.3032722734.

The spelling of 9749643081 in words is "nine billion, seven hundred forty-nine million, six hundred forty-three thousand, eighty-one".