1604000643 has 48 divisors (see below), whose sum is σ = 2725138080. Its totient is φ = 832871424.

The previous prime is 1604000641. The next prime is 1604000681. The reversal of 1604000643 is 3460004061.

It is not a de Polignac number, because 1604000643 - 2¹ = 1604000641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1604000641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61405 + ... + 83537.

It is an arithmetic number, because the mean of its divisors is an integer number (56773710).

Almost surely, 2^1604000643 is an apocalyptic number.

1604000643 is a deficient number, since it is larger than the sum of its proper divisors (1121137437).

1604000643 is a wasteful number, since it uses less digits than its factorization.

1604000643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22196 (or 22189 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1604000643 is about 40049.9768164727. The cubic root of 1604000643 is about 1170.5811131816.

The spelling of 1604000643 in words is "one billion, six hundred four million, six hundred forty-three", and thus it is an aban number.