2520810681 has 8 divisors (see below), whose sum is σ = 3387546624. Its totient is φ = 1667307600.

The previous prime is 2520810673. The next prime is 2520810689. The reversal of 2520810681 is 1860180252.

It is an interprime number because it is at equal distance from previous prime (2520810673) and next prime (2520810689).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2520810681 - 2³ = 2520810673 is a prime.

It is a super-2 number, since 2×2520810681² = 12708972978887367522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2520810689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3307770 + ... + 3308531.

It is an arithmetic number, because the mean of its divisors is an integer number (423443328).

Almost surely, 2^2520810681 is an apocalyptic number.

It is an amenable number.

2520810681 is a deficient number, since it is larger than the sum of its proper divisors (866735943).

2520810681 is a wasteful number, since it uses less digits than its factorization.

2520810681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6616431.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 2520810681 is about 50207.6755187890. The cubic root of 2520810681 is about 1360.9643321011.

The spelling of 2520810681 in words is "two billion, five hundred twenty million, eight hundred ten thousand, six hundred eighty-one".