2006373436645 has 4 divisors (see below), whose sum is σ = 2407648123980. Its totient is φ = 1605098749312.

The previous prime is 2006373436619. The next prime is 2006373436693. The reversal of 2006373436645 is 5466343736002.

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 213297109281 + 1793076327364 = 461841^2 + 1339058^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006373436645 - 2³¹ = 2004225952997 is a prime.

It is a congruent number.

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, 200637343660 + ... + 200637343669.

It is an arithmetic number, because the mean of its divisors is an integer number (601912030995).

Almost surely, 2^{2006373436645} is an apocalyptic number.

It is an amenable number.

2006373436645 is a deficient number, since it is larger than the sum of its proper divisors (401274687335).

2006373436645 is an equidigital number, since it uses as much as digits as its factorization.

2006373436645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401274687334.

The product of its (nonzero) digits is 6531840, while the sum is 49.

The spelling of 2006373436645 in words is "two trillion, six billion, three hundred seventy-three million, four hundred thirty-six thousand, six hundred forty-five".