921672732672 has 624 divisors, whose sum is σ = 2936681879040. Its totient is φ = 288278839296.

The previous prime is 921672732641. The next prime is 921672732677. The reversal of 921672732672 is 276237276129.

It is a happy number.

921672732672 is a `hidden beast` number, since 92 + 167 + 2 + 7 + 326 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921672732677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1067986513 + ... + 1067987375.

It is an arithmetic number, because the mean of its divisors is an integer number (4706220960).

Almost surely, 2^921672732672 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 921672732672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1468340939520).

921672732672 is an abundant number, since it is smaller than the sum of its proper divisors (2015009146368).

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

921672732672 is an equidigital number, since it uses as much as digits as its factorization.

921672732672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 934 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 54.

The spelling of 921672732672 in words is "nine hundred twenty-one billion, six hundred seventy-two million, seven hundred thirty-two thousand, six hundred seventy-two".