28556615146 has 4 divisors (see below), whose sum is σ = 42834922722. Its totient is φ = 14278307572.

The previous prime is 28556615107. The next prime is 28556615159. The reversal of 28556615146 is 64151665582.

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

It can be written as a sum of positive squares in only one way, i.e., 28338018921 + 218596225 = 168339^2 + 14785^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28556615146.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7139153785 + ... + 7139153788.

Almost surely, 2^28556615146 is an apocalyptic number.

28556615146 is a deficient number, since it is larger than the sum of its proper divisors (14278307576).

28556615146 is a wasteful number, since it uses less digits than its factorization.

28556615146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14278307575.

The product of its digits is 1728000, while the sum is 49.

The spelling of 28556615146 in words is "twenty-eight billion, five hundred fifty-six million, six hundred fifteen thousand, one hundred forty-six".