2581251085329 has 32 divisors (see below), whose sum is σ = 4165287909120. Its totient is φ = 1388042452992.

The previous prime is 2581251085313. The next prime is 2581251085337. The reversal of 2581251085329 is 9235801521852.

2581251085329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2581251085329 - 2⁴ = 2581251085313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2581251087329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2080657 + ... + 3080849.

It is an arithmetic number, because the mean of its divisors is an integer number (130165247160).

Almost surely, 2^{2581251085329} is an apocalyptic number.

It is an amenable number.

2581251085329 is a deficient number, since it is larger than the sum of its proper divisors (1584036823791).

2581251085329 is a wasteful number, since it uses less digits than its factorization.

2581251085329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007449.

The product of its (nonzero) digits is 1728000, while the sum is 51.

The spelling of 2581251085329 in words is "two trillion, five hundred eighty-one billion, two hundred fifty-one million, eighty-five thousand, three hundred twenty-nine".