5438204861 has 4 divisors (see below), whose sum is σ = 5512700892. Its totient is φ = 5363708832.

The previous prime is 5438204843. The next prime is 5438204869. The reversal of 5438204861 is 1684028345.

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 1419405625 + 4018799236 = 37675^2 + 63394^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5438204861 is a prime.

It is a super-2 number, since 2×5438204861² = 59148144220408058642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5438204869) 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, 37247906 + ... + 37248051.

It is an arithmetic number, because the mean of its divisors is an integer number (1378175223).

Almost surely, 2^5438204861 is an apocalyptic number.

It is an amenable number.

5438204861 is a deficient number, since it is larger than the sum of its proper divisors (74496031).

5438204861 is an equidigital number, since it uses as much as digits as its factorization.

5438204861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74496030.

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 5438204861 is about 73744.1852690773. The cubic root of 5438204861 is about 1758.5383936483.

The spelling of 5438204861 in words is "five billion, four hundred thirty-eight million, two hundred four thousand, eight hundred sixty-one".