9940810656 has 96 divisors (see below), whose sum is σ = 31576728960. Its totient is φ = 2673156096.

The previous prime is 9940810637. The next prime is 9940810667. The reversal of 9940810656 is 6560180499.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423661 + ... + 446508.

It is an arithmetic number, because the mean of its divisors is an integer number (328924260).

Almost surely, 2^9940810656 is an apocalyptic number.

9940810656 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

9940810656 is an abundant number, since it is smaller than the sum of its proper divisors (21635918304).

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

9940810656 is a wasteful number, since it uses less digits than its factorization.

9940810656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870206 (or 870198 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 9940810656 is about 99703.6140568636. The cubic root of 9940810656 is about 2150.1756233678.

The spelling of 9940810656 in words is "nine billion, nine hundred forty million, eight hundred ten thousand, six hundred fifty-six".