2620881187 has 4 divisors (see below), whose sum is σ = 2624932656. Its totient is φ = 2616829720.

The previous prime is 2620881083. The next prime is 2620881203. The reversal of 2620881187 is 7811880262.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2620881187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620881587) by changing a digit.

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, 2024764 + ... + 2026057.

It is an arithmetic number, because the mean of its divisors is an integer number (656233164).

Almost surely, 2^2620881187 is an apocalyptic number.

2620881187 is a deficient number, since it is larger than the sum of its proper divisors (4051469).

2620881187 is an equidigital number, since it uses as much as digits as its factorization.

2620881187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051468.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 2620881187 is about 51194.5425509399. The cubic root of 2620881187 is about 1378.7402188999.

The spelling of 2620881187 in words is "two billion, six hundred twenty million, eight hundred eighty-one thousand, one hundred eighty-seven".