2891312512 has 48 divisors (see below), whose sum is σ = 6288064380. Its totient is φ = 1313315840.

The previous prime is 2891312509. The next prime is 2891312513. The reversal of 2891312512 is 2152131982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891312513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2016948 + ... + 2018380.

Almost surely, 2^2891312512 is an apocalyptic number.

2891312512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891312512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3144032190).

2891312512 is an abundant number, since it is smaller than the sum of its proper divisors (3396751868).

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

2891312512 is an frugal number, since it uses more digits than its factorization.

2891312512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891 (or 1446 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 2891312512 is about 53770.9262706158. The cubic root of 2891312512 is about 1424.6177305592.

The spelling of 2891312512 in words is "two billion, eight hundred ninety-one million, three hundred twelve thousand, five hundred twelve".