28279136541 has 40 divisors (see below), whose sum is σ = 39851776800. Its totient is φ = 17831700960.

The previous prime is 28279136521. The next prime is 28279136597. The reversal of 28279136541 is 14563197282.

It is not a de Polignac number, because 28279136541 - 2⁹ = 28279136029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28279136521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 163463131 + ... + 163463303.

It is an arithmetic number, because the mean of its divisors is an integer number (996294420).

Almost surely, 2^28279136541 is an apocalyptic number.

It is an amenable number.

28279136541 is a deficient number, since it is larger than the sum of its proper divisors (11572640259).

28279136541 is an frugal number, since it uses more digits than its factorization.

28279136541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 266 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 28279136541 in words is "twenty-eight billion, two hundred seventy-nine million, one hundred thirty-six thousand, five hundred forty-one".