6817775480145 has 144 divisors (see below), whose sum is σ = 14199400051200. Its totient is φ = 3014226432000.

The previous prime is 6817775480141. The next prime is 6817775480221. The reversal of 6817775480145 is 5410845777186.

6817775480145 is a `hidden beast` number, since 6 + 8 + 1 + 7 + 7 + 7 + 5 + 480 + 145 = 666.

It is not a de Polignac number, because 6817775480145 - 2² = 6817775480141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (6817775480141) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 109405206 + ... + 109467504.

It is an arithmetic number, because the mean of its divisors is an integer number (98606944800).

Almost surely, 2^{6817775480145} is an apocalyptic number.

It is an amenable number.

6817775480145 is an abundant number, since it is smaller than the sum of its proper divisors (7381624571055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6817775480145 is a wasteful number, since it uses less digits than its factorization.

6817775480145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63956 (or 63946 counting only the distinct ones).

The product of its (nonzero) digits is 52684800, while the sum is 63.

The spelling of 6817775480145 in words is "six trillion, eight hundred seventeen billion, seven hundred seventy-five million, four hundred eighty thousand, one hundred forty-five".