9987948497900 has 144 divisors (see below), whose sum is σ = 22108691911488. Its totient is φ = 3915744768000.

The previous prime is 9987948497861. The next prime is 9987948497957. The reversal of 9987948497900 is 97948497899.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2844757145 + ... + 2844760655.

Almost surely, 2^{9987948497900} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9987948497900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11054345955744).

9987948497900 is an abundant number, since it is smaller than the sum of its proper divisors (12120743413588).

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

9987948497900 is a wasteful number, since it uses less digits than its factorization.

9987948497900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932 (or 5925 counting only the distinct ones).

The product of its (nonzero) digits is 2962842624, while the sum is 83.

The spelling of 9987948497900 in words is "nine trillion, nine hundred eighty-seven billion, nine hundred forty-eight million, four hundred ninety-seven thousand, nine hundred".