28063156181 has 16 divisors (see below), whose sum is σ = 30413545344. Its totient is φ = 25797533184.

The previous prime is 28063156169. The next prime is 28063156213. The reversal of 28063156181 is 18165136082.

It is a de Polignac number, because none of the positive numbers 2^k-28063156181 is a prime.

It is a super-2 number, since 2×28063156181² (a number of 22 digits) contains 22 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 (28063156081) 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, 18050 + ... + 237596.

It is an arithmetic number, because the mean of its divisors is an integer number (1900846584).

Almost surely, 2^28063156181 is an apocalyptic number.

It is an amenable number.

28063156181 is a deficient number, since it is larger than the sum of its proper divisors (2350389163).

28063156181 is a wasteful number, since it uses less digits than its factorization.

28063156181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219740.

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 28063156181 in words is "twenty-eight billion, sixty-three million, one hundred fifty-six thousand, one hundred eighty-one".