53828380621 has 4 divisors (see below), whose sum is σ = 54565755772. Its totient is φ = 53091005472.

The previous prime is 53828380607. The next prime is 53828380633. The reversal of 53828380621 is 12608382835.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16805233225 + 37023147396 = 129635^2 + 192414^2 .

It is a cyclic number.

It is not a de Polignac number, because 53828380621 - 2¹¹ = 53828378573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53828380601) 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, 368687466 + ... + 368687611.

It is an arithmetic number, because the mean of its divisors is an integer number (13641438943).

Almost surely, 2^53828380621 is an apocalyptic number.

It is an amenable number.

53828380621 is a deficient number, since it is larger than the sum of its proper divisors (737375151).

53828380621 is an equidigital number, since it uses as much as digits as its factorization.

53828380621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737375150.

The product of its (nonzero) digits is 552960, while the sum is 46.

The spelling of 53828380621 in words is "fifty-three billion, eight hundred twenty-eight million, three hundred eighty thousand, six hundred twenty-one".