2006402649 has 4 divisors (see below), whose sum is σ = 2675203536. Its totient is φ = 1337601764.

The previous prime is 2006402647. The next prime is 2006402659. The reversal of 2006402649 is 9462046002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2006402649 - 2¹ = 2006402647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2006402647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334400439 + ... + 334400444.

It is an arithmetic number, because the mean of its divisors is an integer number (668800884).

Almost surely, 2^2006402649 is an apocalyptic number.

It is an amenable number.

2006402649 is a deficient number, since it is larger than the sum of its proper divisors (668800887).

2006402649 is an equidigital number, since it uses as much as digits as its factorization.

2006402649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668800886.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 2006402649 is about 44792.8861427794. The cubic root of 2006402649 is about 1261.2640897857.

The spelling of 2006402649 in words is "two billion, six million, four hundred two thousand, six hundred forty-nine".