6515009144 has 32 divisors (see below), whose sum is σ = 14781955680. Its totient is φ = 2627902464.

The previous prime is 6515009143. The next prime is 6515009159. The reversal of 6515009144 is 4419005156.

It is a super-2 number, since 2×6515009144² = 84890688292807225472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6515009143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3420797 + ... + 3422700.

It is an arithmetic number, because the mean of its divisors is an integer number (461936115).

Almost surely, 2^6515009144 is an apocalyptic number.

It is an amenable number.

6515009144 is an abundant number, since it is smaller than the sum of its proper divisors (8266946536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6515009144 is a wasteful number, since it uses less digits than its factorization.

6515009144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843527 (or 6843523 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 6515009144 is about 80715.6065702290. The cubic root of 6515009144 is about 1867.6909305293.

The spelling of 6515009144 in words is "six billion, five hundred fifteen million, nine thousand, one hundred forty-four".