1044646653 has 4 divisors (see below), whose sum is σ = 1392862208. Its totient is φ = 696431100.

The previous prime is 1044646633. The next prime is 1044646697. The reversal of 1044646653 is 3566464401.

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 not a de Polignac number, because 1044646653 - 2⁸ = 1044646397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044646633) 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, 174107773 + ... + 174107778.

It is an arithmetic number, because the mean of its divisors is an integer number (348215552).

Almost surely, 2^1044646653 is an apocalyptic number.

It is an amenable number.

1044646653 is a deficient number, since it is larger than the sum of its proper divisors (348215555).

1044646653 is an equidigital number, since it uses as much as digits as its factorization.

1044646653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348215554.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 1044646653 is about 32320.9939977099. The cubic root of 1044646653 is about 1014.6660724588. Note that the first 3 decimals are identical.

The spelling of 1044646653 in words is "one billion, forty-four million, six hundred forty-six thousand, six hundred fifty-three".