2581186416 has 20 divisors (see below), whose sum is σ = 6668065032. Its totient is φ = 860395456.

The previous prime is 2581186409. The next prime is 2581186463. The reversal of 2581186416 is 6146811852.

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 3 ways as a sum of consecutive naturals, for example, 26887311 + ... + 26887406.

Almost surely, 2^2581186416 is an apocalyptic number.

It is an amenable number.

2581186416 is an abundant number, since it is smaller than the sum of its proper divisors (4086878616).

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

2581186416 is a wasteful number, since it uses less digits than its factorization.

2581186416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53774728 (or 53774722 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 2581186416 is about 50805.3778255806. The cubic root of 2581186416 is about 1371.7441716873.

The spelling of 2581186416 in words is "two billion, five hundred eighty-one million, one hundred eighty-six thousand, four hundred sixteen".