5143721816 has 16 divisors (see below), whose sum is σ = 9760678200. Its totient is φ = 2540874304.

The previous prime is 5143721813. The next prime is 5143721831. The reversal of 5143721816 is 6181273415.

It is a self number, because there is not a number n which added to its sum of digits gives 5143721816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5143721813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3872621 + ... + 3873948.

Almost surely, 2^5143721816 is an apocalyptic number.

It is an amenable number.

5143721816 is a deficient number, since it is larger than the sum of its proper divisors (4616956384).

5143721816 is a wasteful number, since it uses less digits than its factorization.

5143721816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746658 (or 7746654 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 5143721816 is about 71719.7449521399. The cubic root of 5143721816 is about 1726.2054799727.

The spelling of 5143721816 in words is "five billion, one hundred forty-three million, seven hundred twenty-one thousand, eight hundred sixteen".