2581751609089 has 3 divisors (see below), whose sum is σ = 2581753215873. Its totient is φ = 2581750002306.

The previous prime is 2581751609071. The next prime is 2581751609119. The reversal of 2581751609089 is 9809061571852.

The square root of 2581751609089 is 1606783.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2581751609089 - 2¹¹ = 2581751607041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2581751609389) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 803392 + ... + 2410174.

It is an arithmetic number, because the mean of its divisors is an integer number (860584405291).

Almost surely, 2^{2581751609089} is an apocalyptic number.

2581751609089 is the 1606783-rd square number.

2581751609089 is the 803392-nd centered octagonal number.

It is an amenable number.

2581751609089 is a deficient number, since it is larger than the sum of its proper divisors (1606784).

2581751609089 is an frugal number, since it uses more digits than its factorization.

2581751609089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213566 (or 1606783 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 61.

The spelling of 2581751609089 in words is "two trillion, five hundred eighty-one billion, seven hundred fifty-one million, six hundred nine thousand, eighty-nine".