1604245656 has 32 divisors (see below), whose sum is σ = 4319123760. Its totient is φ = 493613952.

The previous prime is 1604245651. The next prime is 1604245697. The reversal of 1604245656 is 6565424061.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604245651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2570595 + ... + 2571218.

Almost surely, 2^1604245656 is an apocalyptic number.

It is an amenable number.

1604245656 is an abundant number, since it is smaller than the sum of its proper divisors (2714878104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1604245656 is a wasteful number, since it uses less digits than its factorization.

1604245656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5141835 (or 5141831 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 1604245656 is about 40053.0355403932. The cubic root of 1604245656 is about 1170.6407126981.

The spelling of 1604245656 in words is "one billion, six hundred four million, two hundred forty-five thousand, six hundred fifty-six".