2145313645 has 16 divisors (see below), whose sum is σ = 2635934400. Its totient is φ = 1675263744.

The previous prime is 2145313609. The next prime is 2145313673. The reversal of 2145313645 is 5463135412.

It is a cyclic number.

It is not a de Polignac number, because 2145313645 - 2⁷ = 2145313517 is a prime.

It is a super-3 number, since 3×2145313645³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2145313645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578437 + ... + 582133.

It is an arithmetic number, because the mean of its divisors is an integer number (164745900).

Almost surely, 2^2145313645 is an apocalyptic number.

It is an amenable number.

2145313645 is a deficient number, since it is larger than the sum of its proper divisors (490620755).

2145313645 is a wasteful number, since it uses less digits than its factorization.

2145313645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444.

The product of its digits is 43200, while the sum is 34.

The square root of 2145313645 is about 46317.5306444547. The cubic root of 2145313645 is about 1289.7244458810.

The spelling of 2145313645 in words is "two billion, one hundred forty-five million, three hundred thirteen thousand, six hundred forty-five".