1604724945 has 16 divisors (see below), whose sum is σ = 2718593280. Its totient is φ = 805508864.

The previous prime is 1604724943. The next prime is 1604724949. The reversal of 1604724945 is 5494274061.

It is a cyclic number.

It is not a de Polignac number, because 1604724945 - 2¹ = 1604724943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1604724897 and 1604724906.

It is not an unprimeable number, because it can be changed into a prime (1604724943) 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, 3146265 + ... + 3146774.

It is an arithmetic number, because the mean of its divisors is an integer number (169912080).

Almost surely, 2^1604724945 is an apocalyptic number.

1604724945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1604724945 is a deficient number, since it is larger than the sum of its proper divisors (1113868335).

1604724945 is a wasteful number, since it uses less digits than its factorization.

1604724945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293064.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1604724945 is about 40059.0182730431. The cubic root of 1604724945 is about 1170.7572824075.

The spelling of 1604724945 in words is "one billion, six hundred four million, seven hundred twenty-four thousand, nine hundred forty-five".