9981504117451 has 16 divisors (see below), whose sum is σ = 10396352747520. Its totient is φ = 9576783155680.

The previous prime is 9981504117443. The next prime is 9981504117511. The reversal of 9981504117451 is 1547114051899.

It is a cyclic number.

It is not a de Polignac number, because 9981504117451 - 2³ = 9981504117443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9981504117392 and 9981504117401.

It is not an unprimeable number, because it can be changed into a prime (9981504117421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7758865 + ... + 8953378.

It is an arithmetic number, because the mean of its divisors is an integer number (649772046720).

Almost surely, 2^{9981504117451} is an apocalyptic number.

9981504117451 is a deficient number, since it is larger than the sum of its proper divisors (414848630069).

9981504117451 is a wasteful number, since it uses less digits than its factorization.

9981504117451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16712546.

The product of its (nonzero) digits is 1814400, while the sum is 55.

The spelling of 9981504117451 in words is "nine trillion, nine hundred eighty-one billion, five hundred four million, one hundred seventeen thousand, four hundred fifty-one".