6540366865125 has 64 divisors (see below), whose sum is σ = 11023868793600. Its totient is φ = 3443384652800.

The previous prime is 6540366865093. The next prime is 6540366865127. The reversal of 6540366865125 is 5215686630456.

It is a happy number.

It is not a de Polignac number, because 6540366865125 - 2⁵ = 6540366865093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540366865127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8840521 + ... + 9551729.

It is an arithmetic number, because the mean of its divisors is an integer number (172247949900).

Almost surely, 2^{6540366865125} is an apocalyptic number.

It is an amenable number.

6540366865125 is a deficient number, since it is larger than the sum of its proper divisors (4483501928475).

6540366865125 is a wasteful number, since it uses less digits than its factorization.

6540366865125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711543 (or 711533 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 57.

The spelling of 6540366865125 in words is "six trillion, five hundred forty billion, three hundred sixty-six million, eight hundred sixty-five thousand, one hundred twenty-five".