28261082613 has 8 divisors (see below), whose sum is σ = 37817478688. Its totient is φ = 18772704144.

The previous prime is 28261082611. The next prime is 28261082627. The reversal of 28261082613 is 31628016282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28261082613 - 2¹ = 28261082611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28261082611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17003431 + ... + 17005092.

It is an arithmetic number, because the mean of its divisors is an integer number (4727184836).

Almost surely, 2^28261082613 is an apocalyptic number.

It is an amenable number.

28261082613 is a deficient number, since it is larger than the sum of its proper divisors (9556396075).

28261082613 is a wasteful number, since it uses less digits than its factorization.

28261082613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34008803.

The product of its (nonzero) digits is 55296, while the sum is 39.

Adding to 28261082613 its reverse (31628016282), we get a palindrome (59889098895).

The spelling of 28261082613 in words is "twenty-eight billion, two hundred sixty-one million, eighty-two thousand, six hundred thirteen".