4003512649 has 4 divisors (see below), whose sum is σ = 4004418580. Its totient is φ = 4002606720.

The previous prime is 4003512637. The next prime is 4003512697. The reversal of 4003512649 is 9462153004.

It is a happy number.

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 2919457024 + 1084055625 = 54032^2 + 32925^2 .

It is a cyclic number.

It is not a de Polignac number, because 4003512649 - 2⁷ = 4003512521 is a prime.

It is a super-2 number, since 2×4003512649² = 32056227061405994402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4003512619) 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, 446304 + ... + 455185.

It is an arithmetic number, because the mean of its divisors is an integer number (1001104645).

Almost surely, 2^4003512649 is an apocalyptic number.

It is an amenable number.

4003512649 is a deficient number, since it is larger than the sum of its proper divisors (905931).

4003512649 is an equidigital number, since it uses as much as digits as its factorization.

4003512649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905930.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 4003512649 is about 63273.3170380691. The cubic root of 4003512649 is about 1587.8655812438.

The spelling of 4003512649 in words is "four billion, three million, five hundred twelve thousand, six hundred forty-nine".