6411605520 has 80 divisors (see below), whose sum is σ = 20212902720. Its totient is φ = 1680778752.

The previous prime is 6411605483. The next prime is 6411605527. The reversal of 6411605520 is 255061146.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×6411605520² = 82217370688188940800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (6411605527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212239 + ... + 240558.

It is an arithmetic number, because the mean of its divisors is an integer number (252661284).

Almost surely, 2^6411605520 is an apocalyptic number.

6411605520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6411605520 is an abundant number, since it is smaller than the sum of its proper divisors (13801297200).

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

6411605520 is a wasteful number, since it uses less digits than its factorization.

6411605520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452872 (or 452866 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 6411605520 is about 80072.5016469449. The cubic root of 6411605520 is about 1857.7571068625.

Adding to 6411605520 its reverse (255061146), we get a palindrome (6666666666).

The spelling of 6411605520 in words is "six billion, four hundred eleven million, six hundred five thousand, five hundred twenty".