6540503015121 has 16 divisors (see below), whose sum is σ = 8803015200000. Its totient is φ = 4319170892048.

The previous prime is 6540503015117. The next prime is 6540503015131. The reversal of 6540503015121 is 1215103050456.

It is a cyclic number.

It is not a de Polignac number, because 6540503015121 - 2² = 6540503015117 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6540503015131) 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, 2399830 + ... + 4340528.

It is an arithmetic number, because the mean of its divisors is an integer number (550188450000).

Almost surely, 2^{6540503015121} is an apocalyptic number.

It is an amenable number.

6540503015121 is a deficient number, since it is larger than the sum of its proper divisors (2262512184879).

6540503015121 is a wasteful number, since it uses less digits than its factorization.

6540503015121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951308.

The product of its (nonzero) digits is 18000, while the sum is 33.

Adding to 6540503015121 its reverse (1215103050456), we get a palindrome (7755606065577).

The spelling of 6540503015121 in words is "six trillion, five hundred forty billion, five hundred three million, fifteen thousand, one hundred twenty-one".