28980553613 has 4 divisors (see below), whose sum is σ = 31615149408. Its totient is φ = 26345957820.

The previous prime is 28980553603. The next prime is 28980553619. The reversal of 28980553613 is 31635508982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28980553613 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 (28980553619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317297881 + ... + 1317297902.

It is an arithmetic number, because the mean of its divisors is an integer number (7903787352).

Almost surely, 2^28980553613 is an apocalyptic number.

It is an amenable number.

28980553613 is a deficient number, since it is larger than the sum of its proper divisors (2634595795).

28980553613 is a wasteful number, since it uses less digits than its factorization.

28980553613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2634595794.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 28980553613 in words is "twenty-eight billion, nine hundred eighty million, five hundred fifty-three thousand, six hundred thirteen".