2581005998 has 16 divisors (see below), whose sum is σ = 4046991360. Its totient is φ = 1233063000.

The previous prime is 2581005989. The next prime is 2581006013. The reversal of 2581005998 is 8995001852.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258578 + ... + 268373.

It is an arithmetic number, because the mean of its divisors is an integer number (252936960).

Almost surely, 2^2581005998 is an apocalyptic number.

2581005998 is a deficient number, since it is larger than the sum of its proper divisors (1465985362).

2581005998 is a wasteful number, since it uses less digits than its factorization.

2581005998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527063.

The product of its (nonzero) digits is 259200, while the sum is 47.

The square root of 2581005998 is about 50803.6022148036. The cubic root of 2581005998 is about 1371.7122105311.

The spelling of 2581005998 in words is "two billion, five hundred eighty-one million, five thousand, nine hundred ninety-eight".