28509755370969 has 8 divisors (see below), whose sum is σ = 38026936452960. Its totient is φ = 18999538934816.

The previous prime is 28509755370931. The next prime is 28509755370973. The reversal of 28509755370969 is 96907355790582.

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

It is a cyclic number.

It is not a de Polignac number, because 28509755370969 - 2⁷ = 28509755370841 is a prime.

It is a super-2 number, since 2×28509755370969² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28509755370969.

It is not an unprimeable number, because it can be changed into a prime (28509755370919) 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, 1741151907 + ... + 1741168280.

It is an arithmetic number, because the mean of its divisors is an integer number (4753367056620).

Almost surely, 2^{28509755370969} is an apocalyptic number.

It is an amenable number.

28509755370969 is a deficient number, since it is larger than the sum of its proper divisors (9517181081991).

28509755370969 is a wasteful number, since it uses less digits than its factorization.

28509755370969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482322919.

The product of its (nonzero) digits is 1285956000, while the sum is 75.

The spelling of 28509755370969 in words is "twenty-eight trillion, five hundred nine billion, seven hundred fifty-five million, three hundred seventy thousand, nine hundred sixty-nine".