5406807881 has 2 divisors, whose sum is σ = 5406807882. Its totient is φ = 5406807880.

The previous prime is 5406807871. The next prime is 5406807971. The reversal of 5406807881 is 1887086045.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4262000656 + 1144807225 = 65284^2 + 33835^2 .

It is a cyclic number.

It is not a de Polignac number, because 5406807881 - 2¹⁴ = 5406791497 is a prime.

It is a super-2 number, since 2×5406807881² = 58467142924087420322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5406807871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2703403940 + 2703403941.

It is an arithmetic number, because the mean of its divisors is an integer number (2703403941).

Almost surely, 2^5406807881 is an apocalyptic number.

It is an amenable number.

5406807881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5406807881 is an equidigital number, since it uses as much as digits as its factorization.

5406807881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 47.

The square root of 5406807881 is about 73530.9994560117. Note that the first 3 decimals coincide. The cubic root of 5406807881 is about 1755.1476060839.

The spelling of 5406807881 in words is "five billion, four hundred six million, eight hundred seven thousand, eight hundred eighty-one".