6541026261345 has 12 divisors (see below), whose sum is σ = 11337778853076. Its totient is φ = 3488547339360.

The previous prime is 6541026261233. The next prime is 6541026261359. The reversal of 6541026261345 is 5431626201456.

6541026261345 is a `hidden beast` number, since 6 + 5 + 4 + 1 + 0 + 2 + 626 + 13 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2168695077201 + 4372331184144 = 1472649^2 + 2091012^2 .

It is not a de Polignac number, because 6541026261345 - 2⁸ = 6541026261089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 145356139141 = 6541026261345 / (6 + 5 + 4 + 1 + 0 + 2 + 6 + 2 + 6 + 1 + 3 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 6541026261345.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72678069526 + ... + 72678069615.

It is an arithmetic number, because the mean of its divisors is an integer number (944814904423).

Almost surely, 2^{6541026261345} is an apocalyptic number.

It is an amenable number.

6541026261345 is a deficient number, since it is larger than the sum of its proper divisors (4796752591731).

6541026261345 is a wasteful number, since it uses less digits than its factorization.

6541026261345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145356139152 (or 145356139149 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 6541026261345 in words is "six trillion, five hundred forty-one billion, twenty-six million, two hundred sixty-one thousand, three hundred forty-five".