5018321644 has 12 divisors (see below), whose sum is σ = 10036643344. Its totient is φ = 2150709264.

The previous prime is 5018321621. The next prime is 5018321657. The reversal of 5018321644 is 4461238105.

5018321644 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89612859 + ... + 89612914.

Almost surely, 2^5018321644 is an apocalyptic number.

It is an amenable number.

5018321644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

5018321644 is a wasteful number, since it uses less digits than its factorization.

5018321644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179225784 (or 179225782 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 5018321644 is about 70840.1132410162. The cubic root of 5018321644 is about 1712.0620387416.

Adding to 5018321644 its reverse (4461238105), we get a palindrome (9479559749).

The spelling of 5018321644 in words is "five billion, eighteen million, three hundred twenty-one thousand, six hundred forty-four".