2125781810528 has 48 divisors (see below), whose sum is σ = 4276116411840. Its totient is φ = 1039804502016.

The previous prime is 2125781810489. The next prime is 2125781810639. The reversal of 2125781810528 is 8250181875212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3009008 + ... + 3647696.

It is an arithmetic number, because the mean of its divisors is an integer number (89085758580).

Almost surely, 2^{2125781810528} 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 2125781810528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138058205920).

2125781810528 is an abundant number, since it is smaller than the sum of its proper divisors (2150334601312).

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

2125781810528 is a wasteful number, since it uses less digits than its factorization.

2125781810528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640959 (or 640951 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 50.

The spelling of 2125781810528 in words is "two trillion, one hundred twenty-five billion, seven hundred eighty-one million, eight hundred ten thousand, five hundred twenty-eight".