6406532880 has 80 divisors (see below), whose sum is σ = 21665738304. Its totient is φ = 1553098240.

The previous prime is 6406532863. The next prime is 6406532893. The reversal of 6406532880 is 882356046.

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

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, 1210719 + ... + 1215998.

Almost surely, 2^6406532880 is an apocalyptic number.

6406532880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6406532880 is an abundant number, since it is smaller than the sum of its proper divisors (15259205424).

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

6406532880 is a wasteful number, since it uses less digits than its factorization.

6406532880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426744 (or 2426738 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 6406532880 is about 80040.8200857537. The cubic root of 6406532880 is about 1857.2670465951.

The spelling of 6406532880 in words is "six billion, four hundred six million, five hundred thirty-two thousand, eight hundred eighty".