6501976980 has 48 divisors (see below), whose sum is σ = 18375698880. Its totient is φ = 1717654528.

The previous prime is 6501976967. The next prime is 6501976997. The reversal of 6501976980 is 896791056.

It is a congruent number.

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, 499965 + ... + 512804.

It is an arithmetic number, because the mean of its divisors is an integer number (382827060).

Almost surely, 2^6501976980 is an apocalyptic number.

6501976980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6501976980 is an abundant number, since it is smaller than the sum of its proper divisors (11873721900).

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

6501976980 is a wasteful number, since it uses less digits than its factorization.

6501976980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012888 (or 1012886 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The square root of 6501976980 is about 80634.8372603306. The cubic root of 6501976980 is about 1866.4447669192. Note that the first 3 decimals are identical.

The spelling of 6501976980 in words is "six billion, five hundred one million, nine hundred seventy-six thousand, nine hundred eighty".