5218647461 has 4 divisors (see below), whose sum is σ = 5220554124. Its totient is φ = 5216740800.

The previous prime is 5218647451. The next prime is 5218647479. The reversal of 5218647461 is 1647468125.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2791114561 + 2427532900 = 52831^2 + 49270^2 .

It is a cyclic number.

It is not a de Polignac number, because 5218647461 - 2³⁰ = 4144905637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5218647451) 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, 949220 + ... + 954701.

It is an arithmetic number, because the mean of its divisors is an integer number (1305138531).

Almost surely, 2^5218647461 is an apocalyptic number.

It is an amenable number.

5218647461 is a deficient number, since it is larger than the sum of its proper divisors (1906663).

5218647461 is a wasteful number, since it uses less digits than its factorization.

5218647461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1906662.

The product of its digits is 322560, while the sum is 44.

The square root of 5218647461 is about 72240.2066788295. The cubic root of 5218647461 is about 1734.5466580701.

The spelling of 5218647461 in words is "five billion, two hundred eighteen million, six hundred forty-seven thousand, four hundred sixty-one".