6750427738545 has 24 divisors (see below), whose sum is σ = 11700897085800. Its totient is φ = 3600180228096.

The previous prime is 6750427738543. The next prime is 6750427738597. The reversal of 6750427738545 is 5458377240576.

It is a happy number.

6750427738545 is a `hidden beast` number, since 6 + 7 + 50 + 4 + 2 + 7 + 7 + 38 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1665114094449 + 5085313644096 = 1290393^2 + 2255064^2 .

It is not a de Polignac number, because 6750427738545 - 2¹ = 6750427738543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6750427738543) 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, 2561521 + ... + 4479089.

It is an arithmetic number, because the mean of its divisors is an integer number (487537378575).

Almost surely, 2^{6750427738545} is an apocalyptic number.

It is an amenable number.

6750427738545 is a deficient number, since it is larger than the sum of its proper divisors (4950469347255).

6750427738545 is a wasteful number, since it uses less digits than its factorization.

6750427738545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995809 (or 1995806 counting only the distinct ones).

The product of its (nonzero) digits is 197568000, while the sum is 63.

The spelling of 6750427738545 in words is "six trillion, seven hundred fifty billion, four hundred twenty-seven million, seven hundred thirty-eight thousand, five hundred forty-five".