2581720576 has 20 divisors (see below), whose sum is σ = 5158399752. Its totient is φ = 1290860032.

The previous prime is 2581720511. The next prime is 2581720597. The reversal of 2581720576 is 6750271852.

It is a super-2 number, since 2×2581720576² = 13330562265083543552, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2520700 + ... + 2521723.

Almost surely, 2^2581720576 is an apocalyptic number.

It is an amenable number.

2581720576 is a deficient number, since it is larger than the sum of its proper divisors (2576679176).

2581720576 is an frugal number, since it uses more digits than its factorization.

2581720576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042441 (or 5042425 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 2581720576 is about 50810.6344774399. The cubic root of 2581720576 is about 1371.8387897182.

The spelling of 2581720576 in words is "two billion, five hundred eighty-one million, seven hundred twenty thousand, five hundred seventy-six".