9981504117450 has 72 divisors (see below), whose sum is σ = 26937230156928. Its totient is φ = 2649798375840.

The previous prime is 9981504117443. The next prime is 9981504117511. The reversal of 9981504117450 is 547114051899.

9981504117450 is a `hidden beast` number, since 9 + 9 + 8 + 1 + 504 + 11 + 74 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49633104 + ... + 49833803.

It is an arithmetic number, because the mean of its divisors is an integer number (374128196624).

Almost surely, 2^{9981504117450} is an apocalyptic number.

9981504117450 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9981504117450 is an abundant number, since it is smaller than the sum of its proper divisors (16955726039478).

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

9981504117450 is a wasteful number, since it uses less digits than its factorization.

9981504117450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99467148 (or 99467140 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 54.

The spelling of 9981504117450 in words is "nine trillion, nine hundred eighty-one billion, five hundred four million, one hundred seventeen thousand, four hundred fifty".