2581251085339 has 16 divisors (see below), whose sum is σ = 2818170917280. Its totient is φ = 2355746457600.

The previous prime is 2581251085337. The next prime is 2581251085433. The reversal of 2581251085339 is 9335801521852.

It is a cyclic number.

It is not a de Polignac number, because 2581251085339 - 2¹ = 2581251085337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2581251085337) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18106054 + ... + 18248059.

It is an arithmetic number, because the mean of its divisors is an integer number (176135682330).

Almost surely, 2^{2581251085339} is an apocalyptic number.

2581251085339 is a deficient number, since it is larger than the sum of its proper divisors (236919831941).

2581251085339 is a wasteful number, since it uses less digits than its factorization.

2581251085339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36354270.

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 2581251085339 in words is "two trillion, five hundred eighty-one billion, two hundred fifty-one million, eighty-five thousand, three hundred thirty-nine".