6460889138 has 18 divisors (see below), whose sum is σ = 10654519743. Its totient is φ = 2936199420.

The previous prime is 6460889107. The next prime is 6460889159. The reversal of 6460889138 is 8319880646.

It can be written as a sum of positive squares in only one way, i.e., 3230444569 + 3230444569 = 56837^2 + 56837^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=56837.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6460889138.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1247831 + ... + 1252997.

Almost surely, 2^6460889138 is an apocalyptic number.

6460889138 is a deficient number, since it is larger than the sum of its proper divisors (4193630605).

6460889138 is an frugal number, since it uses more digits than its factorization.

6460889138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10358 (or 5180 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 6460889138 is about 80379.6562445996. The cubic root of 6460889138 is about 1862.5049244378.

It can be divided in two parts, 6460 and 889138, that added together give a palindrome (895598).

The spelling of 6460889138 in words is "six billion, four hundred sixty million, eight hundred eighty-nine thousand, one hundred thirty-eight".