2581026305990 has 32 divisors (see below), whose sum is σ = 5071820140800. Its totient is φ = 937884088800.

The previous prime is 2581026305981. The next prime is 2581026306031. The reversal of 2581026305990 is 995036201852.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8232056 + ... + 8539835.

It is an arithmetic number, because the mean of its divisors is an integer number (158494379400).

Almost surely, 2^{2581026305990} is an apocalyptic number.

2581026305990 is a deficient number, since it is larger than the sum of its proper divisors (2490793834810).

2581026305990 is a wasteful number, since it uses less digits than its factorization.

2581026305990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773308.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 2581026305990 in words is "two trillion, five hundred eighty-one billion, twenty-six million, three hundred five thousand, nine hundred ninety".