9999999999976 has 32 divisors (see below), whose sum is σ = 21518230752000. Its totient is φ = 4267782421056.

The previous prime is 9999999999971. The next prime is 10000000000037. The reversal of 9999999999976 is 6799999999999.

9999999999976 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-9 number, since 9×9999999999976⁹ (a number of 118 digits) contains 999999999 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999999999971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373567011 + ... + 373593778.

It is an arithmetic number, because the mean of its divisors is an integer number (672444711000).

Almost surely, 2^{9999999999976} is an apocalyptic number.

It is an amenable number.

9999999999976 is an abundant number, since it is smaller than the sum of its proper divisors (11518230752024).

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

9999999999976 is a wasteful number, since it uses less digits than its factorization.

9999999999976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747161041 (or 747161037 counting only the distinct ones).

The product of its digits is 1318004503578, while the sum is 112.

The spelling of 9999999999976 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-six".