4492561921 has 16 divisors (see below), whose sum is σ = 4681006848. Its totient is φ = 4308163200.

The previous prime is 4492561919. The next prime is 4492561961. The reversal of 4492561921 is 1291652944.

It is a cyclic number.

It is not a de Polignac number, because 4492561921 - 2¹ = 4492561919 is a prime.

It is a super-2 number, since 2×4492561921² = 40366225228038420482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4492561901) 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, 1484616 + ... + 1487638.

It is an arithmetic number, because the mean of its divisors is an integer number (292562928).

Almost surely, 2^4492561921 is an apocalyptic number.

4492561921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4492561921 is a deficient number, since it is larger than the sum of its proper divisors (188444927).

4492561921 is a wasteful number, since it uses less digits than its factorization.

4492561921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672.

The product of its digits is 155520, while the sum is 43.

The square root of 4492561921 is about 67026.5762291347. The cubic root of 4492561921 is about 1650.0534933376.

The spelling of 4492561921 in words is "four billion, four hundred ninety-two million, five hundred sixty-one thousand, nine hundred twenty-one".