1604620641 has 16 divisors (see below), whose sum is σ = 2307989376. Its totient is φ = 985779456.

The previous prime is 1604620627. The next prime is 1604620651. The reversal of 1604620641 is 1460264061.

It is not a de Polignac number, because 1604620641 - 2⁷ = 1604620513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1604620599 and 1604620608.

It is not an unprimeable number, because it can be changed into a prime (1604620621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11565 + ... + 57818.

It is an arithmetic number, because the mean of its divisors is an integer number (144249336).

Almost surely, 2^1604620641 is an apocalyptic number.

It is an amenable number.

1604620641 is a deficient number, since it is larger than the sum of its proper divisors (703368735).

1604620641 is a wasteful number, since it uses less digits than its factorization.

1604620641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69992.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 1604620641 is about 40057.7163727540. The cubic root of 1604620641 is about 1170.7319162092.

The spelling of 1604620641 in words is "one billion, six hundred four million, six hundred twenty thousand, six hundred forty-one".