6517578891345 has 16 divisors (see below), whose sum is σ = 10451351462400. Its totient is φ = 3468300329984.

The previous prime is 6517578891247. The next prime is 6517578891347. The reversal of 6517578891345 is 5431988757156.

It is a cyclic number.

It is not a de Polignac number, because 6517578891345 - 2²⁸ = 6517310455889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6517578891345.

It is not an unprimeable number, because it can be changed into a prime (6517578891347) 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, 483852129 + ... + 483865598.

It is an arithmetic number, because the mean of its divisors is an integer number (653209466400).

Almost surely, 2^{6517578891345} is an apocalyptic number.

It is an amenable number.

6517578891345 is a deficient number, since it is larger than the sum of its proper divisors (3933772571055).

6517578891345 is a wasteful number, since it uses less digits than its factorization.

6517578891345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967718184.

The product of its digits is 254016000, while the sum is 69.

The spelling of 6517578891345 in words is "six trillion, five hundred seventeen billion, five hundred seventy-eight million, eight hundred ninety-one thousand, three hundred forty-five".