2581198794 has 24 divisors (see below), whose sum is σ = 5593781700. Its totient is φ = 860217408.

The previous prime is 2581198783. The next prime is 2581198813. The reversal of 2581198794 is 4978911852.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2442830625 + 138368169 = 49425^2 + 11763^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2581198794.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93024 + ... + 117540.

Almost surely, 2^2581198794 is an apocalyptic number.

2581198794 is an abundant number, since it is smaller than the sum of its proper divisors (3012582906).

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

2581198794 is a wasteful number, since it uses less digits than its factorization.

2581198794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30374 (or 30371 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 2581198794 is about 50805.4996432473. The cubic root of 2581198794 is about 1371.7463644028.

The spelling of 2581198794 in words is "two billion, five hundred eighty-one million, one hundred ninety-eight thousand, seven hundred ninety-four".