28133651626 has 4 divisors (see below), whose sum is σ = 42200477442. Its totient is φ = 14066825812.

The previous prime is 28133651621. The next prime is 28133651641. The reversal of 28133651626 is 62615633182.

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., 28111552225 + 22099401 = 167665^2 + 4701^2 .

It is not an unprimeable number, because it can be changed into a prime (28133651621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7033412905 + ... + 7033412908.

Almost surely, 2^28133651626 is an apocalyptic number.

28133651626 is a deficient number, since it is larger than the sum of its proper divisors (14066825816).

28133651626 is a wasteful number, since it uses less digits than its factorization.

28133651626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14066825815.

The product of its digits is 311040, while the sum is 43.

The spelling of 28133651626 in words is "twenty-eight billion, one hundred thirty-three million, six hundred fifty-one thousand, six hundred twenty-six".