6511881480 has 64 divisors (see below), whose sum is σ = 21038391360. Its totient is φ = 1602924288.

The previous prime is 6511881461. The next prime is 6511881491. The reversal of 6511881480 is 841881156.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085582 + ... + 2088701.

It is an arithmetic number, because the mean of its divisors is an integer number (328724865).

Almost surely, 2^6511881480 is an apocalyptic number.

6511881480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6511881480 is an abundant number, since it is smaller than the sum of its proper divisors (14526509880).

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

6511881480 is a wasteful number, since it uses less digits than its factorization.

6511881480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174310 (or 4174306 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The square root of 6511881480 is about 80696.2296517006. The cubic root of 6511881480 is about 1867.3920082210.

The spelling of 6511881480 in words is "six billion, five hundred eleven million, eight hundred eighty-one thousand, four hundred eighty".