2318320278645 has 16 divisors (see below), whose sum is σ = 4239214224000. Its totient is φ = 1059803555904.

The previous prime is 2318320278623. The next prime is 2318320278647. The reversal of 2318320278645 is 5468720238132.

It is not a de Polignac number, because 2318320278645 - 2²⁰ = 2318319230069 is a prime.

It is a super-3 number, since 3×2318320278645³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2318320278647) 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, 11039620270 + ... + 11039620479.

It is an arithmetic number, because the mean of its divisors is an integer number (264950889000).

Almost surely, 2^{2318320278645} is an apocalyptic number.

It is an amenable number.

2318320278645 is a deficient number, since it is larger than the sum of its proper divisors (1920893945355).

2318320278645 is a wasteful number, since it uses less digits than its factorization.

2318320278645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22079240764.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 2318320278645 in words is "two trillion, three hundred eighteen billion, three hundred twenty million, two hundred seventy-eight thousand, six hundred forty-five".