28655319461 has 4 divisors (see below), whose sum is σ = 28655688192. Its totient is φ = 28654950732.

The previous prime is 28655319457. The next prime is 28655319463. The reversal of 28655319461 is 16491355682.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28655319461 - 2² = 28655319457 is a prime.

It is a super-2 number, since 2×28655319461² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28655319463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17381 + ... + 240026.

It is an arithmetic number, because the mean of its divisors is an integer number (7163922048).

Almost surely, 2^28655319461 is an apocalyptic number.

It is an amenable number.

28655319461 is a deficient number, since it is larger than the sum of its proper divisors (368731).

28655319461 is a wasteful number, since it uses less digits than its factorization.

28655319461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368730.

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

The spelling of 28655319461 in words is "twenty-eight billion, six hundred fifty-five million, three hundred nineteen thousand, four hundred sixty-one".