2539889691 has 16 divisors (see below), whose sum is σ = 3453926400. Its totient is φ = 1659621600.

The previous prime is 2539889663. The next prime is 2539889711. The reversal of 2539889691 is 1969889352.

It is a happy number.

2539889691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2539889691 - 2⁵ = 2539889659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2539889621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159510 + ... + 174708.

It is an arithmetic number, because the mean of its divisors is an integer number (215870400).

Almost surely, 2^2539889691 is an apocalyptic number.

2539889691 is a deficient number, since it is larger than the sum of its proper divisors (914036709).

2539889691 is a wasteful number, since it uses less digits than its factorization.

2539889691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16306.

The product of its digits is 8398080, while the sum is 60.

The square root of 2539889691 is about 50397.3182917504. The cubic root of 2539889691 is about 1364.3892379555.

The spelling of 2539889691 in words is "two billion, five hundred thirty-nine million, eight hundred eighty-nine thousand, six hundred ninety-one".