1535561604 has 96 divisors (see below), whose sum is σ = 4197661440. Its totient is φ = 484475904.

The previous prime is 1535561603. The next prime is 1535561617. The reversal of 1535561604 is 4061655351.

1535561604 is a `hidden beast` number, since 1 + 5 + 35 + 5 + 616 + 0 + 4 = 666.

1535561604 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1535561603) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237762 + ... + 244134.

It is an arithmetic number, because the mean of its divisors is an integer number (43725640).

Almost surely, 2^1535561604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1535561604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2098830720).

1535561604 is an abundant number, since it is smaller than the sum of its proper divisors (2662099836).

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

1535561604 is a wasteful number, since it uses less digits than its factorization.

1535561604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506 (or 6498 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1535561604 is about 39186.2425348489. The cubic root of 1535561604 is about 1153.6898755852.

The spelling of 1535561604 in words is "one billion, five hundred thirty-five million, five hundred sixty-one thousand, six hundred four".