28153148521 has 9 divisors (see below), whose sum is σ = 29716244733. Its totient is φ = 26668383660.

The previous prime is 28153148509. The next prime is 28153148539. The reversal of 28153148521 is 12584135182.

The square root of 28153148521 is 167789.

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

It is not a de Polignac number, because 28153148521 - 2¹⁷ = 28153017449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28153148501) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3183576 + ... + 3192406.

Almost surely, 2^28153148521 is an apocalyptic number.

28153148521 is the 167789-th square number.

28153148521 is the 83895-th centered octagonal number.

It is an amenable number.

28153148521 is a deficient number, since it is larger than the sum of its proper divisors (1563096212).

28153148521 is an frugal number, since it uses more digits than its factorization.

28153148521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700 (or 8850 counting only the distinct ones).

The product of its digits is 76800, while the sum is 40.

The spelling of 28153148521 in words is "twenty-eight billion, one hundred fifty-three million, one hundred forty-eight thousand, five hundred twenty-one".