5147218640 has 20 divisors (see below), whose sum is σ = 11967283524. Its totient is φ = 2058887424.

The previous prime is 5147218633. The next prime is 5147218663. The reversal of 5147218640 is 468127415.

It can be written as a sum of positive squares in 2 ways, for example, as 2083374736 + 3063843904 = 45644^2 + 55352^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 5147218594 and 5147218603.

It is a congruent 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, 32170037 + ... + 32170196.

Almost surely, 2^5147218640 is an apocalyptic number.

It is an amenable number.

5147218640 is an abundant number, since it is smaller than the sum of its proper divisors (6820064884).

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

5147218640 is a wasteful number, since it uses less digits than its factorization.

5147218640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64340246 (or 64340240 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 5147218640 is about 71744.1192015067. The cubic root of 5147218640 is about 1726.5965631627.

The spelling of 5147218640 in words is "five billion, one hundred forty-seven million, two hundred eighteen thousand, six hundred forty".