4636111921 has 27 divisors (see below), whose sum is σ = 5510274987. Its totient is φ = 3889243680.

The previous prime is 4636111903. The next prime is 4636111927. The reversal of 4636111921 is 1291116364.

The square root of 4636111921 is 68089.

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

It can be written as a sum of positive squares in only one way, i.e., 2723274225 + 1912837696 = 52185^2 + 43736^2 .

It is not a de Polignac number, because 4636111921 - 2⁵ = 4636111889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4636111927) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33840165 + ... + 33840301.

Almost surely, 2^4636111921 is an apocalyptic number.

4636111921 is the 68089-th square number.

4636111921 is the 34045-th centered octagonal number.

It is an amenable number.

4636111921 is a deficient number, since it is larger than the sum of its proper divisors (874163066).

4636111921 is an frugal number, since it uses more digits than its factorization.

4636111921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 215 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The cubic root of 4636111921 is about 1667.4441788596. Note that the first 3 decimals are identical.

The spelling of 4636111921 in words is "four billion, six hundred thirty-six million, one hundred eleven thousand, nine hundred twenty-one".