2639945594 has 16 divisors (see below), whose sum is σ = 4652212320. Its totient is φ = 1107669360.

The previous prime is 2639945551. The next prime is 2639945611. The reversal of 2639945594 is 4955499362.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4615004 + ... + 4615575.

It is an arithmetic number, because the mean of its divisors is an integer number (290763270).

Almost surely, 2^2639945594 is an apocalyptic number.

2639945594 is a deficient number, since it is larger than the sum of its proper divisors (2012266726).

2639945594 is a wasteful number, since it uses less digits than its factorization.

2639945594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9230605.

The product of its digits is 10497600, while the sum is 56.

The square root of 2639945594 is about 51380.4008742633. The cubic root of 2639945594 is about 1382.0751517833.

The spelling of 2639945594 in words is "two billion, six hundred thirty-nine million, nine hundred forty-five thousand, five hundred ninety-four".