28069754181 has 16 divisors (see below), whose sum is σ = 42822549504. Its totient is φ = 16021263024.

The previous prime is 28069754149. The next prime is 28069754243. The reversal of 28069754181 is 18145796082.

It is not a de Polignac number, because 28069754181 - 2⁵ = 28069754149 is a prime.

It is a super-2 number, since 2×28069754181² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28069756181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756301 + ... + 792546.

It is an arithmetic number, because the mean of its divisors is an integer number (2676409344).

Almost surely, 2^28069754181 is an apocalyptic number.

28069754181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28069754181 is a deficient number, since it is larger than the sum of its proper divisors (14752795323).

28069754181 is a wasteful number, since it uses less digits than its factorization.

28069754181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549720.

The product of its (nonzero) digits is 967680, while the sum is 51.

The spelling of 28069754181 in words is "twenty-eight billion, sixty-nine million, seven hundred fifty-four thousand, one hundred eighty-one".