1601604525 has 96 divisors (see below), whose sum is σ = 2899814400. Its totient is φ = 777254400.

The previous prime is 1601604497. The next prime is 1601604647. The reversal of 1601604525 is 5254061061.

It is not a de Polignac number, because 1601604525 - 2⁷ = 1601604397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1601604492 and 1601604501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4615402 + ... + 4615748.

It is an arithmetic number, because the mean of its divisors is an integer number (30206400).

Almost surely, 2^1601604525 is an apocalyptic number.

1601604525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1601604525 is a deficient number, since it is larger than the sum of its proper divisors (1298209875).

1601604525 is a wasteful number, since it uses less digits than its factorization.

1601604525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1601604525 is about 40020.0515366985. The cubic root of 1601604525 is about 1169.9979362956.

Adding to 1601604525 its reverse (5254061061), we get a palindrome (6855665586).

The spelling of 1601604525 in words is "one billion, six hundred one million, six hundred four thousand, five hundred twenty-five".