16024774921 has 9 divisors (see below), whose sum is σ = 16118104149. Its totient is φ = 15931985184.

The previous prime is 16024774903. The next prime is 16024774943. The reversal of 16024774921 is 12947742061.

The square root of 16024774921 is 126589.

It is a perfect power (a square), and thus also a powerful number.

16024774921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 42758521 + 15982016400 = 6539^2 + 126420^2 .

It is not a de Polignac number, because 16024774921 - 2⁷ = 16024774793 is a prime.

It is a super-2 number, since 2×16024774921² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16024774901) 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 8 ways as a sum of consecutive naturals, for example, 35064925 + ... + 35065381.

It is an arithmetic number, because the mean of its divisors is an integer number (1790900461).

Almost surely, 2^16024774921 is an apocalyptic number.

16024774921 is the 126589-th square number.

16024774921 is the 63295-th centered octagonal number.

It is an amenable number.

16024774921 is a deficient number, since it is larger than the sum of its proper divisors (93329228).

16024774921 is an frugal number, since it uses more digits than its factorization.

16024774921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468 (or 734 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 16024774921 in words is "sixteen billion, twenty-four million, seven hundred seventy-four thousand, nine hundred twenty-one".