1604630643 has 64 divisors (see below), whose sum is σ = 2710609920. Its totient is φ = 820224000.

The previous prime is 1604630633. The next prime is 1604630669. The reversal of 1604630643 is 3460364061.

It is not a de Polignac number, because 1604630643 - 2¹² = 1604626547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1604630603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6243571 + ... + 6243827.

It is an arithmetic number, because the mean of its divisors is an integer number (42353280).

Almost surely, 2^1604630643 is an apocalyptic number.

1604630643 is a deficient number, since it is larger than the sum of its proper divisors (1105979277).

1604630643 is a wasteful number, since it uses less digits than its factorization.

1604630643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 1604630643 is about 40057.8412174196. The cubic root of 1604630643 is about 1170.7343486920.

The spelling of 1604630643 in words is "one billion, six hundred four million, six hundred thirty thousand, six hundred forty-three".