921550464 has 192 divisors, whose sum is σ = 2835518400. Its totient is φ = 286433280.

The previous prime is 921550463. The next prime is 921550477. The reversal of 921550464 is 464055129.

921550464 is a `hidden beast` number, since 92 + 1 + 5 + 504 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

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 (921550463) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1553752 + ... + 1554344.

It is an arithmetic number, because the mean of its divisors is an integer number (14768325).

Almost surely, 2^921550464 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 921550464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1417759200).

921550464 is an abundant number, since it is smaller than the sum of its proper divisors (1913967936).

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

921550464 is a wasteful number, since it uses less digits than its factorization.

921550464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 921550464 is about 30357.0496590166. The cubic root of 921550464 is about 973.1348833336.

The spelling of 921550464 in words is "nine hundred twenty-one million, five hundred fifty thousand, four hundred sixty-four".