2002078145 has 4 divisors (see below), whose sum is σ = 2402493780. Its totient is φ = 1601662512.

The previous prime is 2002078097. The next prime is 2002078153. The reversal of 2002078145 is 5418702002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 685549489 + 1316528656 = 26183^2 + 36284^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002078145 - 2⁶ = 2002078081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200207810 + ... + 200207819.

It is an arithmetic number, because the mean of its divisors is an integer number (600623445).

Almost surely, 2^2002078145 is an apocalyptic number.

It is an amenable number.

2002078145 is a deficient number, since it is larger than the sum of its proper divisors (400415635).

2002078145 is an equidigital number, since it uses as much as digits as its factorization.

2002078145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400415634.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 2002078145 is about 44744.5878850169. The cubic root of 2002078145 is about 1260.3572819425.

The spelling of 2002078145 in words is "two billion, two million, seventy-eight thousand, one hundred forty-five".