1604987513 has 16 divisors (see below), whose sum is σ = 1788388800. Its totient is φ = 1433920320.

The previous prime is 1604987507. The next prime is 1604987557. The reversal of 1604987513 is 3157894061.

It is a cyclic number.

It is not a de Polignac number, because 1604987513 - 2⁴ = 1604987497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604987113) 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, 10178 + ... + 57563.

It is an arithmetic number, because the mean of its divisors is an integer number (111774300).

Almost surely, 2^1604987513 is an apocalyptic number.

It is an amenable number.

1604987513 is a deficient number, since it is larger than the sum of its proper divisors (183401287).

1604987513 is a wasteful number, since it uses less digits than its factorization.

1604987513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67832.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1604987513 is about 40062.2954035337. The cubic root of 1604987513 is about 1170.8211327337.

The spelling of 1604987513 in words is "one billion, six hundred four million, nine hundred eighty-seven thousand, five hundred thirteen".