2318775716545 has 8 divisors (see below), whose sum is σ = 2782552096296. Its totient is φ = 1855006415616.

The previous prime is 2318775716533. The next prime is 2318775716549. The reversal of 2318775716545 is 5456175778132.

It can be written as a sum of positive squares in 4 ways, for example, as 652902784576 + 1665872931969 = 808024^2 + 1290687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2318775716545 - 2⁷ = 2318775716417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2318775716549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1020202 + ... + 2382931.

It is an arithmetic number, because the mean of its divisors is an integer number (347819012037).

Almost surely, 2^{2318775716545} is an apocalyptic number.

It is an amenable number.

2318775716545 is a deficient number, since it is larger than the sum of its proper divisors (463776379751).

2318775716545 is a wasteful number, since it uses less digits than its factorization.

2318775716545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539411.

The product of its digits is 49392000, while the sum is 61.

The spelling of 2318775716545 in words is "two trillion, three hundred eighteen billion, seven hundred seventy-five million, seven hundred sixteen thousand, five hundred forty-five".