5639155644 has 48 divisors (see below), whose sum is σ = 13554832256. Its totient is φ = 1823342400.

The previous prime is 5639155619. The next prime is 5639155651. The reversal of 5639155644 is 4465519365.

It is a junction number, because it is equal to n+sod(n) for n = 5639155593 and 5639155602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127779 + ... + 166149.

Almost surely, 2^5639155644 is an apocalyptic number.

It is an amenable number.

5639155644 is an abundant number, since it is smaller than the sum of its proper divisors (7915676612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5639155644 is a wasteful number, since it uses less digits than its factorization.

5639155644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38746 (or 38744 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 48.

The square root of 5639155644 is about 75094.3116620693. The cubic root of 5639155644 is about 1779.9372578146.

The spelling of 5639155644 in words is "five billion, six hundred thirty-nine million, one hundred fifty-five thousand, six hundred forty-four".