1533778064 has 80 divisors (see below), whose sum is σ = 3664682112. Its totient is φ = 605574144.

The previous prime is 1533778031. The next prime is 1533778091. The reversal of 1533778064 is 4608773351.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285052 + ... + 1286244.

Almost surely, 2^1533778064 is an apocalyptic number.

1533778064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1533778064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1832341056).

1533778064 is an abundant number, since it is smaller than the sum of its proper divisors (2130904048).

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

1533778064 is a wasteful number, since it uses less digits than its factorization.

1533778064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The square root of 1533778064 is about 39163.4787014637. The cubic root of 1533778064 is about 1153.2430359843.

The spelling of 1533778064 in words is "one billion, five hundred thirty-three million, seven hundred seventy-eight thousand, sixty-four".