1533256164 has 72 divisors (see below), whose sum is σ = 4233247200. Its totient is φ = 464054400.

The previous prime is 1533256159. The next prime is 1533256171. The reversal of 1533256164 is 4616523351.

1533256164 is a `hidden beast` number, since 1 + 5 + 3 + 32 + 5 + 616 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 413559 + ... + 417249.

It is an arithmetic number, because the mean of its divisors is an integer number (58795100).

Almost surely, 2^1533256164 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 1533256164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2116623600).

1533256164 is an abundant number, since it is smaller than the sum of its proper divisors (2699991036).

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

1533256164 is a wasteful number, since it uses less digits than its factorization.

1533256164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4761 (or 4756 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1533256164 is about 39156.8150390197. The cubic root of 1533256164 is about 1153.1122161405.

The spelling of 1533256164 in words is "one billion, five hundred thirty-three million, two hundred fifty-six thousand, one hundred sixty-four".