28787766650025 has 12 divisors (see below), whose sum is σ = 47595774194832. Its totient is φ = 15353475546640.

The previous prime is 28787766649979. The next prime is 28787766650047. The reversal of 28787766650025 is 52005666778782.

It is not a de Polignac number, because 28787766650025 - 2⁹ = 28787766649513 is a prime.

It is a super-3 number, since 3×28787766650025³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191918444259 + ... + 191918444408.

It is an arithmetic number, because the mean of its divisors is an integer number (3966314516236).

Almost surely, 2^{28787766650025} is an apocalyptic number.

28787766650025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28787766650025 is a deficient number, since it is larger than the sum of its proper divisors (18808007544807).

28787766650025 is a wasteful number, since it uses less digits than its factorization.

28787766650025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383836888680 (or 383836888675 counting only the distinct ones).

The product of its (nonzero) digits is 474163200, while the sum is 69.

The spelling of 28787766650025 in words is "twenty-eight trillion, seven hundred eighty-seven billion, seven hundred sixty-six million, six hundred fifty thousand, twenty-five".