2639437845 has 32 divisors (see below), whose sum is σ = 4658808960. Its totient is φ = 1265341440.

The previous prime is 2639437837. The next prime is 2639437861. The reversal of 2639437845 is 5487349362.

It is not a de Polignac number, because 2639437845 - 2³ = 2639437837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75184 + ... + 104553.

It is an arithmetic number, because the mean of its divisors is an integer number (145587780).

Almost surely, 2^2639437845 is an apocalyptic number.

It is an amenable number.

2639437845 is a deficient number, since it is larger than the sum of its proper divisors (2019371115).

2639437845 is a wasteful number, since it uses less digits than its factorization.

2639437845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179845.

The product of its digits is 4354560, while the sum is 51.

The square root of 2639437845 is about 51375.4595599884. The cubic root of 2639437845 is about 1381.9865398220.

The spelling of 2639437845 in words is "two billion, six hundred thirty-nine million, four hundred thirty-seven thousand, eight hundred forty-five".