28153582940025 has 45 divisors (see below), whose sum is σ = 52150609995583. Its totient is φ = 15015116890800.

The previous prime is 28153582939969. The next prime is 28153582940027. The reversal of 28153582940025 is 52004928535182.

The square root of 28153582940025 is 5305995.

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

28153582940025 is a `hidden beast` number, since 2 + 8 + 1 + 53 + 582 + 9 + 4 + 0 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10135289858409 + 18018293081616 = 3183597^2 + 4244796^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 28153582940025 - 2²⁷ = 28153448722297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28153582940027) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 238710820 + ... + 238828730.

Almost surely, 2^{28153582940025} is an apocalyptic number.

28153582940025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28153582940025 is the 5305995-th square number.

28153582940025 is the 2652998-th centered octagonal number.

It is an amenable number.

28153582940025 is a deficient number, since it is larger than the sum of its proper divisors (23997027055558).

28153582940025 is an frugal number, since it uses more digits than its factorization.

28153582940025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235844 (or 117919 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 54.

The spelling of 28153582940025 in words is "twenty-eight trillion, one hundred fifty-three billion, five hundred eighty-two million, nine hundred forty thousand, twenty-five".