4909021965 has 24 divisors (see below), whose sum is σ = 8513256960. Its totient is φ = 2616826464.

The previous prime is 4909021927. The next prime is 4909021967. The reversal of 4909021965 is 5691209094.

4909021965 is a `hidden beast` number, since 490 + 90 + 2 + 19 + 65 = 666.

It is not a de Polignac number, because 4909021965 - 2²⁵ = 4875467533 is a prime.

It is a super-2 number, since 2×4909021965² = 48196993305704922450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 4909021965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4909021967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66396 + ... + 119274.

It is an arithmetic number, because the mean of its divisors is an integer number (354719040).

Almost surely, 2^4909021965 is an apocalyptic number.

4909021965 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4909021965 is a deficient number, since it is larger than the sum of its proper divisors (3604234995).

4909021965 is a wasteful number, since it uses less digits than its factorization.

4909021965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54953 (or 54950 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 4909021965 is about 70064.4129712081. The cubic root of 4909021965 is about 1699.5410485410.

The spelling of 4909021965 in words is "four billion, nine hundred nine million, twenty-one thousand, nine hundred sixty-five".