2891431489206 has 16 divisors (see below), whose sum is σ = 6227698592304. Its totient is φ = 889671227424.

The previous prime is 2891431489189. The next prime is 2891431489211. The reversal of 2891431489206 is 6029841341982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18534817161 + ... + 18534817316.

It is an arithmetic number, because the mean of its divisors is an integer number (389231162019).

Almost surely, 2^{2891431489206} is an apocalyptic number.

2891431489206 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2891431489206 is an abundant number, since it is smaller than the sum of its proper divisors (3336267103098).

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

2891431489206 is a wasteful number, since it uses less digits than its factorization.

2891431489206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37069634495.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 2891431489206 in words is "two trillion, eight hundred ninety-one billion, four hundred thirty-one million, four hundred eighty-nine thousand, two hundred six".