2543888512956 has 96 divisors (see below), whose sum is σ = 6892086648832. Its totient is φ = 715235209920.

The previous prime is 2543888512861. The next prime is 2543888512969. The reversal of 2543888512956 is 6592158883452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5208561 + ... + 5675991.

Almost surely, 2^{2543888512956} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543888512956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3446043324416).

2543888512956 is an abundant number, since it is smaller than the sum of its proper divisors (4348198135876).

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

2543888512956 is a wasteful number, since it uses less digits than its factorization.

2543888512956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468479 (or 468477 counting only the distinct ones).

The product of its digits is 165888000, while the sum is 66.

The spelling of 2543888512956 in words is "two trillion, five hundred forty-three billion, eight hundred eighty-eight million, five hundred twelve thousand, nine hundred fifty-six".