2007881639 has 6 divisors (see below), whose sum is σ = 2119122000. Its totient is φ = 1902203316.

The previous prime is 2007881609. The next prime is 2007881647. The reversal of 2007881639 is 9361887002.

It is a de Polignac number, because none of the positive numbers 2^k-2007881639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2007881639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2007881609) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2780639 + ... + 2781360.

It is an arithmetic number, because the mean of its divisors is an integer number (353187000).

Almost surely, 2^2007881639 is an apocalyptic number.

2007881639 is a deficient number, since it is larger than the sum of its proper divisors (111240361).

2007881639 is an equidigital number, since it uses as much as digits as its factorization.

2007881639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562037 (or 5562018 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 2007881639 is about 44809.3923078633. The cubic root of 2007881639 is about 1261.5739210509.

The spelling of 2007881639 in words is "two billion, seven million, eight hundred eighty-one thousand, six hundred thirty-nine".