1520646912 has 144 divisors (see below), whose sum is σ = 4733904000. Its totient is φ = 480162816.

The previous prime is 1520646899. The next prime is 1520646913. The reversal of 1520646912 is 2196460251.

1520646912 is a `hidden beast` number, since 1 + 5 + 2 + 0 + 646 + 9 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 (1520646913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125539 + ... + 137117.

Almost surely, 2^1520646912 is an apocalyptic number.

1520646912 is a gapful number since it is divisible by the number (12) 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 1520646912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2366952000).

1520646912 is an abundant number, since it is smaller than the sum of its proper divisors (3213257088).

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

1520646912 is a wasteful number, since it uses less digits than its factorization.

1520646912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11623 (or 11603 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1520646912 is about 38995.4729680254. The cubic root of 1520646912 is about 1149.9425080269.

The spelling of 1520646912 in words is "one billion, five hundred twenty million, six hundred forty-six thousand, nine hundred twelve".