2581481358 has 24 divisors (see below), whose sum is σ = 5645486808. Its totient is φ = 852451152.

The previous prime is 2581481347. The next prime is 2581481359. The reversal of 2581481358 is 8531841852.

2581481358 is a `hidden beast` number, since 2 + 581 + 4 + 8 + 13 + 58 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581481359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668241 + ... + 672092.

It is an arithmetic number, because the mean of its divisors is an integer number (235228617).

Almost surely, 2^2581481358 is an apocalyptic number.

2581481358 is an abundant number, since it is smaller than the sum of its proper divisors (3064005450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2581481358 is a wasteful number, since it uses less digits than its factorization.

2581481358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340448 (or 1340445 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 2581481358 is about 50808.2804078233. The cubic root of 2581481358 is about 1371.7964176310.

The spelling of 2581481358 in words is "two billion, five hundred eighty-one million, four hundred eighty-one thousand, three hundred fifty-eight".