4508721653 has 4 divisors (see below), whose sum is σ = 4510890348. Its totient is φ = 4506552960.

The previous prime is 4508721599. The next prime is 4508721677. The reversal of 4508721653 is 3561278054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3561278054 = 2 ⋅1780639027.

It can be written as a sum of positive squares in 2 ways, for example, as 3219768049 + 1288953604 = 56743^2 + 35902^2 .

It is a cyclic number.

It is not a de Polignac number, because 4508721653 - 2¹² = 4508717557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4508721653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4508726653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081226 + ... + 1085387.

It is an arithmetic number, because the mean of its divisors is an integer number (1127722587).

Almost surely, 2^4508721653 is an apocalyptic number.

It is an amenable number.

4508721653 is a deficient number, since it is larger than the sum of its proper divisors (2168695).

4508721653 is a wasteful number, since it uses less digits than its factorization.

4508721653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168694.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 4508721653 is about 67147.0152203357. The cubic root of 4508721653 is about 1652.0295384707.

The spelling of 4508721653 in words is "four billion, five hundred eight million, seven hundred twenty-one thousand, six hundred fifty-three".