6540812433745 has 4 divisors (see below), whose sum is σ = 7848974920500. Its totient is φ = 5232649946992.

The previous prime is 6540812433737. The next prime is 6540812433763. The reversal of 6540812433745 is 5473342180456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 904903197696 + 5635909236049 = 951264^2 + 2374007^2 .

It is a cyclic number.

It is not a de Polignac number, because 6540812433745 - 2³ = 6540812433737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6540812433692 and 6540812433701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654081243370 + ... + 654081243379.

It is an arithmetic number, because the mean of its divisors is an integer number (1962243730125).

Almost surely, 2^{6540812433745} is an apocalyptic number.

It is an amenable number.

6540812433745 is a deficient number, since it is larger than the sum of its proper divisors (1308162486755).

6540812433745 is a wasteful number, since it uses less digits than its factorization.

6540812433745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308162486754.

The product of its (nonzero) digits is 9676800, while the sum is 52.

The spelling of 6540812433745 in words is "six trillion, five hundred forty billion, eight hundred twelve million, four hundred thirty-three thousand, seven hundred forty-five".