28888251111081 has 24 divisors (see below), whose sum is σ = 41829006229920. Its totient is φ = 19212018636096.

The previous prime is 28888251110963. The next prime is 28888251111089. The reversal of 28888251111081 is 18011115288882.

28888251111081 is a `hidden beast` number, since 2 + 8 + 8 + 8 + 8 + 2 + 511 + 110 + 8 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28888251111081 is a prime.

It is a super-3 number, since 3×28888251111081³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (28888251111089) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5692510 + ... + 9496376.

It is an arithmetic number, because the mean of its divisors is an integer number (1742875259580).

Almost surely, 2^{28888251111081} is an apocalyptic number.

It is an amenable number.

28888251111081 is a deficient number, since it is larger than the sum of its proper divisors (12940755118839).

28888251111081 is a wasteful number, since it uses less digits than its factorization.

28888251111081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805925 (or 3805922 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 54.

The spelling of 28888251111081 in words is "twenty-eight trillion, eight hundred eighty-eight billion, two hundred fifty-one million, one hundred eleven thousand, eighty-one".