28369769005057 has 4 divisors (see below), whose sum is σ = 28371720575556. Its totient is φ = 28367817434560.

The previous prime is 28369769005031. The next prime is 28369769005073. The reversal of 28369769005057 is 75050096796382.

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 10875425479681 + 17494343525376 = 3297791^2 + 4182624^2 .

It is a cyclic number.

It is not a de Polignac number, because 28369769005057 - 2¹⁹ = 28369768480769 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28369769004983 and 28369769005001.

It is not an unprimeable number, because it can be changed into a prime (28369769005157) 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, 975763444 + ... + 975792517.

It is an arithmetic number, because the mean of its divisors is an integer number (7092930143889).

Almost surely, 2^{28369769005057} is an apocalyptic number.

It is an amenable number.

28369769005057 is a deficient number, since it is larger than the sum of its proper divisors (1951570499).

28369769005057 is a wasteful number, since it uses less digits than its factorization.

28369769005057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951570498.

The product of its (nonzero) digits is 171460800, while the sum is 67.

The spelling of 28369769005057 in words is "twenty-eight trillion, three hundred sixty-nine billion, seven hundred sixty-nine million, five thousand, fifty-seven".