2981398881509 has 16 divisors (see below), whose sum is σ = 3000905544384. Its totient is φ = 2961947452800.

The previous prime is 2981398881491. The next prime is 2981398881551. The reversal of 2981398881509 is 9051888931892.

It is a cyclic number.

It is not a de Polignac number, because 2981398881509 - 2²⁸ = 2981130446053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981398886509) 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, 388553297 + ... + 388560969.

It is an arithmetic number, because the mean of its divisors is an integer number (187556596524).

Almost surely, 2^{2981398881509} is an apocalyptic number.

It is an amenable number.

2981398881509 is a deficient number, since it is larger than the sum of its proper divisors (19506662875).

2981398881509 is a wasteful number, since it uses less digits than its factorization.

2981398881509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10948.

The product of its (nonzero) digits is 89579520, while the sum is 71.

The spelling of 2981398881509 in words is "two trillion, nine hundred eighty-one billion, three hundred ninety-eight million, eight hundred eighty-one thousand, five hundred nine".