511661472 has 96 divisors (see below), whose sum is σ = 1570770432. Its totient is φ = 142781184.

The previous prime is 511661459. The next prime is 511661489. The reversal of 511661472 is 274166115.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20043 + ... + 37749.

It is an arithmetic number, because the mean of its divisors is an integer number (16362192).

Almost surely, 2^511661472 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 511661472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (785385216).

511661472 is an abundant number, since it is smaller than the sum of its proper divisors (1059108960).

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

511661472 is a wasteful number, since it uses less digits than its factorization.

511661472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17770 (or 17762 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 511661472 is about 22619.9352784220. The cubic root of 511661472 is about 799.8236444596.

The spelling of 511661472 in words is "five hundred eleven million, six hundred sixty-one thousand, four hundred seventy-two".