9799656867440 has 40 divisors (see below), whose sum is σ = 24855493329648. Its totient is φ = 3563511587840.

The previous prime is 9799656867433. The next prime is 9799656867461. The reversal of 9799656867440 is 447686569979.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×9799656867440³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5567985977 + ... + 5567987736.

Almost surely, 2^{9799656867440} is an apocalyptic number.

It is an amenable number.

9799656867440 is an abundant number, since it is smaller than the sum of its proper divisors (15055836462208).

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

9799656867440 is a wasteful number, since it uses less digits than its factorization.

9799656867440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11135973737 (or 11135973731 counting only the distinct ones).

The product of its (nonzero) digits is 4938071040, while the sum is 80.

The spelling of 9799656867440 in words is "nine trillion, seven hundred ninety-nine billion, six hundred fifty-six million, eight hundred sixty-seven thousand, four hundred forty".