2528580681 has 36 divisors (see below), whose sum is σ = 4053771904. Its totient is φ = 1517527440.

The previous prime is 2528580661. The next prime is 2528580707. The reversal of 2528580681 is 1860858252.

2528580681 is a `hidden beast` number, since 2 + 5 + 2 + 8 + 580 + 68 + 1 = 666.

It is not a de Polignac number, because 2528580681 - 2¹⁹ = 2528056393 is a prime.

It is a super-2 number, since 2×2528580681² = 12787440520652847522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2528580611) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 100896 + ... + 123438.

Almost surely, 2^2528580681 is an apocalyptic number.

It is an amenable number.

2528580681 is a deficient number, since it is larger than the sum of its proper divisors (1525191223).

2528580681 is a wasteful number, since it uses less digits than its factorization.

2528580681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22674 (or 22660 counting only the distinct ones).

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

The square root of 2528580681 is about 50284.9945908320. The cubic root of 2528580681 is about 1362.3612169165.

The spelling of 2528580681 in words is "two billion, five hundred twenty-eight million, five hundred eighty thousand, six hundred eighty-one".