28755672653 has 4 divisors (see below), whose sum is σ = 28921890588. Its totient is φ = 28589454720.

The previous prime is 28755672643. The next prime is 28755672661. The reversal of 28755672653 is 35627655782.

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 15414960649 + 13340712004 = 124157^2 + 115502^2 .

It is a cyclic number.

It is not a de Polignac number, because 28755672653 - 2¹⁰ = 28755671629 is a prime.

It is a super-3 number, since 3×28755672653³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28755672623) 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, 83108708 + ... + 83109053.

It is an arithmetic number, because the mean of its divisors is an integer number (7230472647).

Almost surely, 2^28755672653 is an apocalyptic number.

It is an amenable number.

28755672653 is a deficient number, since it is larger than the sum of its proper divisors (166217935).

28755672653 is a wasteful number, since it uses less digits than its factorization.

28755672653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166217934.

The product of its digits is 21168000, while the sum is 56.

The spelling of 28755672653 in words is "twenty-eight billion, seven hundred fifty-five million, six hundred seventy-two thousand, six hundred fifty-three".