6459315881 has 4 divisors (see below), whose sum is σ = 6470668500. Its totient is φ = 6447963264.

The previous prime is 6459315871. The next prime is 6459315893. The reversal of 6459315881 is 1885139546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1885139546 = 2 ⋅942569773.

It can be written as a sum of positive squares in 2 ways, for example, as 3769960000 + 2689355881 = 61400^2 + 51859^2 .

It is a cyclic number.

It is not a de Polignac number, because 6459315881 - 2⁶ = 6459315817 is a prime.

It is a super-2 number, since 2×6459315881² = 83445523301077612322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6459315871) 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, 5675456 + ... + 5676593.

It is an arithmetic number, because the mean of its divisors is an integer number (1617667125).

Almost surely, 2^6459315881 is an apocalyptic number.

It is an amenable number.

6459315881 is a deficient number, since it is larger than the sum of its proper divisors (11352619).

6459315881 is a wasteful number, since it uses less digits than its factorization.

6459315881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11352618.

The product of its digits is 1036800, while the sum is 50.

The square root of 6459315881 is about 80369.8692359270. The cubic root of 6459315881 is about 1862.3537359188.

The spelling of 6459315881 in words is "six billion, four hundred fifty-nine million, three hundred fifteen thousand, eight hundred eighty-one".