2041644521 has 4 divisors (see below), whose sum is σ = 2333308032. Its totient is φ = 1749981012.

The previous prime is 2041644511. The next prime is 2041644533. The reversal of 2041644521 is 1254461402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1254461402 = 2 ⋅627230701.

It is a cyclic number.

It is not a de Polignac number, because 2041644521 - 2¹⁸ = 2041382377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2041644511) 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, 145831745 + ... + 145831758.

It is an arithmetic number, because the mean of its divisors is an integer number (583327008).

Almost surely, 2^2041644521 is an apocalyptic number.

It is an amenable number.

2041644521 is a deficient number, since it is larger than the sum of its proper divisors (291663511).

2041644521 is an equidigital number, since it uses as much as digits as its factorization.

2041644521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291663510.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2041644521 is about 45184.5606485224. The cubic root of 2041644521 is about 1268.6058483414.

The spelling of 2041644521 in words is "two billion, forty-one million, six hundred forty-four thousand, five hundred twenty-one".