28780348096513 has 4 divisors (see below), whose sum is σ = 30994221027028. Its totient is φ = 26566475166000.

The previous prime is 28780348096481. The next prime is 28780348096517. The reversal of 28780348096513 is 31569084308782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8918244513649 + 19862103582864 = 2986343^2 + 4456692^2 .

It is a cyclic number.

It is not a de Polignac number, because 28780348096513 - 2⁵ = 28780348096481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28780348096517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1106936465238 + ... + 1106936465263.

It is an arithmetic number, because the mean of its divisors is an integer number (7748555256757).

It is a 1-persistent number, because it is pandigital, but 2⋅28780348096513 = 57560696193026 is not.

Almost surely, 2^{28780348096513} is an apocalyptic number.

It is an amenable number.

28780348096513 is a deficient number, since it is larger than the sum of its proper divisors (2213872930515).

28780348096513 is a wasteful number, since it uses less digits than its factorization.

28780348096513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213872930514.

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 28780348096513 in words is "twenty-eight trillion, seven hundred eighty billion, three hundred forty-eight million, ninety-six thousand, five hundred thirteen".