28612412665 has 8 divisors (see below), whose sum is σ = 34468495560. Its totient is φ = 22800863232.

The previous prime is 28612412663. The next prime is 28612412669. The reversal of 28612412665 is 56621421682.

It can be written as a sum of positive squares in 4 ways, for example, as 19837032336 + 8775380329 = 140844^2 + 93677^2 .

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 28612412665 - 2¹ = 28612412663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28612412663) 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, 11131950 + ... + 11134519.

It is an arithmetic number, because the mean of its divisors is an integer number (4308561945).

Almost surely, 2^28612412665 is an apocalyptic number.

It is an amenable number.

28612412665 is a deficient number, since it is larger than the sum of its proper divisors (5856082895).

28612412665 is a wasteful number, since it uses less digits than its factorization.

28612412665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22266731.

The product of its digits is 276480, while the sum is 43.

The spelling of 28612412665 in words is "twenty-eight billion, six hundred twelve million, four hundred twelve thousand, six hundred sixty-five".