5939981638 has 4 divisors (see below), whose sum is σ = 8909972460. Its totient is φ = 2969990818.

The previous prime is 5939981581. The next prime is 5939981699. The reversal of 5939981638 is 8361899395.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1484995408 + ... + 1484995411.

It is an arithmetic number, because the mean of its divisors is an integer number (2227493115).

Almost surely, 2^5939981638 is an apocalyptic number.

5939981638 is a deficient number, since it is larger than the sum of its proper divisors (2969990822).

5939981638 is a wasteful number, since it uses less digits than its factorization.

5939981638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2969990821.

The product of its digits is 12597120, while the sum is 61.

The square root of 5939981638 is about 77071.2763485853. The cubic root of 5939981638 is about 1811.0413549108.

The spelling of 5939981638 in words is "five billion, nine hundred thirty-nine million, nine hundred eighty-one thousand, six hundred thirty-eight".