2081006639 has 8 divisors (see below), whose sum is σ = 2129856768. Its totient is φ = 2032347160.

The previous prime is 2081006611. The next prime is 2081006687. The reversal of 2081006639 is 9366001802.

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

It is a cyclic number.

It is not a de Polignac number, because 2081006639 - 2²⁴ = 2064229423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2081006599 and 2081006608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081008639) 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, 25457 + ... + 69354.

It is an arithmetic number, because the mean of its divisors is an integer number (266232096).

Almost surely, 2^2081006639 is an apocalyptic number.

2081006639 is a deficient number, since it is larger than the sum of its proper divisors (48850129).

2081006639 is an equidigital number, since it uses as much as digits as its factorization.

2081006639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95325.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 2081006639 is about 45618.0516791325. The cubic root of 2081006639 is about 1276.7067521297.

The spelling of 2081006639 in words is "two billion, eighty-one million, six thousand, six hundred thirty-nine".