1533645216 has 36 divisors (see below), whose sum is σ = 4361304402. Its totient is φ = 511214976.

The previous prime is 1533645149. The next prime is 1533645257. The reversal of 1533645216 is 6125463351.

1533645216 is a `hidden beast` number, since 1 + 5 + 3 + 3 + 645 + 2 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1505129616 + 28515600 = 38796^2 + 5340^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 5 ways as a sum of consecutive naturals, for example, 2662291 + ... + 2662866.

Almost surely, 2^1533645216 is an apocalyptic number.

1533645216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1533645216 is an abundant number, since it is smaller than the sum of its proper divisors (2827659186).

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

1533645216 is a wasteful number, since it uses less digits than its factorization.

1533645216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325173 (or 5325162 counting only the distinct ones).

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

The square root of 1533645216 is about 39161.7825947696. The cubic root of 1533645216 is about 1153.2097390213.

The spelling of 1533645216 in words is "one billion, five hundred thirty-three million, six hundred forty-five thousand, two hundred sixteen".