6512539753980 has 72 divisors (see below), whose sum is σ = 21274296537312. Its totient is φ = 1603086708096.

The previous prime is 6512539753963. The next prime is 6512539753987. The reversal of 6512539753980 is 893579352156.

It is a happy number.

6512539753980 is a `hidden beast` number, since 6 + 5 + 1 + 2 + 5 + 3 + 97 + 539 + 8 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6512539753987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1391565984 + ... + 1391570663.

It is an arithmetic number, because the mean of its divisors is an integer number (295476340796).

Almost surely, 2^{6512539753980} is an apocalyptic number.

6512539753980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6512539753980 is an abundant number, since it is smaller than the sum of its proper divisors (14761756783332).

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

6512539753980 is a wasteful number, since it uses less digits than its factorization.

6512539753980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783136675 (or 2783136670 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 6512539753980 in words is "six trillion, five hundred twelve billion, five hundred thirty-nine million, seven hundred fifty-three thousand, nine hundred eighty".